Location: Littleroot Town, Route 103

When you start the game, when you go to leave your home, your mother recommends that you introduce yourself to the neighbours and there you will meet Brendan/May depending on your gender. They will introduce themselves and then mention that they were meant to help Professor Birch catch wild Pokémon. You can find them in Route 103 after receiving your starter, where they will challenge you.

Pokémon Trainer Brendan / May	Treecko
Items	Level 5
	Overgrow
	Attacks: Pound
	Hold Item: No Item

Pokémon Trainer Brendan / May	Torchic
Items	Level 5
	Blaze
	Attacks: Scratch
	Hold Item: No Item

Pokémon Trainer Brendan / May	Mudkip
Items	Level 5
	Torrent
	Attacks: Tackle
	Hold Item: No Item

Afterwards, as you go to leave for Route 101 again, Brendan/May will stop you and give you an upgrade to your PokéNav Plus, the DexNav, in order for you to catch rarer Pokémon.

Location: Route 102

You next encounter your rival in Route 102 to tell you about the DexNav's Detector Mode, showing it off as a swarm of Beautifly fly over towards Petalburg City. After the fly away, they mention how your father is the Gym Leader in Petalburg City and how they may challenge him once they have trained up their Pokémon more.

Location: Rustboro City

When you enter Rustboro City, you will meet up with your rival again as they exit the PokéMart. They will tell you that the city has got a Pokémon Gym and then say that they'll challenge it once they have caught more Pokémon.

Location: Route 110

When you get to Route 110, you will encounter your rival once again. They will say that they were searching for Pokémon in the route and that it has been a while since you last encountered them. After mentioning that there used to be more Pokémon in ancient times which is why they do research, they will challenge you. Defeat them and they will give you the Dowsing Machine

Pokémon Trainer Brendan / May	Slugma	Wailmer	Grovyle
Items	Level 18	Level 18	Level 20
	Magma Armor	Water Veil	Overgrow
	Attacks: Ember Rock Throw Harden Incinerate	Attacks: Water Gun Rollout Whirlpool Astonish	Attacks: Quick Attack Mega Drain Fury Cutter Pursuit
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Pokémon Trainer Brendan / May	Wailmer	Shroomish	Combusken
Items	Level 18	Level 18	Level 20
	Water Veil	Effect Spore	Blaze
	Attacks: Water Gun Rollout Whirlpool Astonish	Attacks: Stun Spore Leech Seed Mega Drain Headbutt	Attacks: Sand Attack Peck Double Kick Flame Charge
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Pokémon Trainer Brendan / May	Shroomish	Slugma	Marshtomp
Items	Level 18	Level 18	Level 20
	Effect Spore	Magma Armor	Torrent
	Attacks: Stun Spore Leech Seed Mega Drain Headbutt	Attacks: Ember Rock Throw Harden Incinerate	Attacks: Mud-Slap Foresight Mud Shot Bide
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Location: Route 112

When you first enter Route 112, you will bump into your rival yet again. They will point out the large Mt.Chimney and how they'd like to take the cable car up to it one day. They heal your Pokémon and then give you HM04, Strength, which you can't use until you have the Heat Badge from Lavaridge Town Gym.

Location: Fallarbor Town, Meteor Falls

When you reach Fallarbor Town, you will encounter your rival who introduces you to Professor Cozmo, however when you get to Route 114, you will see them chase down Team Aqua/Magma into Meteor Falls after they have kidnapped the Professor. During this, she will help battle with you against Team Magma & Aqua.

Location: Lavaridge Town

After you have defeated the Lavaridge Town Gym, you will meet up with your rival again, who was a bit worried about you after Team Magma & Aqua. She notices you've got the Meteorite back and gives you the Go-Goggles. She then offers to take you to Petalburg City directly as she is going there.

Location: Route 119

When you reach the end of Route 119, you will encounter your rival yet again. They will say they have been looking all over for you and notice your Mega Bracelet. Because of it, they challenge you. When you defeat them, they will give you HM02, Fly, which cannot be used until you get the Fortree City Gym Badge

Pokémon Trainer Brendan / May	Slugma	Wailmer	Grovyle
Items	Level 31	Level 31	Level 33
	Magma Armor	Water Veil	Overgrow
	Attacks: Clear Smog Ancient Power Flame Burst Rock Slide	Attacks: Water Pulse Mist Brine Rest	Attacks: Pursuit Leaf Blade Agility Slam
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Pokémon Trainer Brendan / May	Wailmer	Shroomish	Combusken
Items	Level 31	Level 31	Level 33
	Water Veil	Effect Spore	Blaze
	Attacks: Water Pulse Mist Brine Rest	Attacks: Poison Powder Worry Seed Giga Drain Growth	Attacks: Double Kick Flame Charge Quick Attack Bulk Up
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Pokémon Trainer Brendan / May	Shroomish	Slugma	Marshtomp
Items	Level 31	Level 31	Level 33
	Effect Spore	Magma Armor	Torrent
	Attacks: Poison Powder Worry Seed Giga Drain Growth	Attacks: Clear Smog Ancient Power Flame Burst Rock Slide	Attacks: Bide Mud Bomb Rock Slide Protect
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Location: Lilycove City

When you reach Lilycove City, you will encounter your rival once again. They will notice how strong you have become and once again notice how your Meteorite is shining. They will then challenge you to a battle to test out their skill.

Pokémon Trainer Brendan / May	Swellow	Magcargo	Wailord	Sceptile
Items	Level 37	Level 37	Level 37	Level 39
	Guts	Magma Armor	Water Veil	Overgrow
	Attacks: Double Team Aerial Ace Quick Guard Agility	Attacks: Flame Burst Rock Slide Lava Plume Amnesia	Attacks: Rest Brine Water Spout Amnesia	Attacks: Agility Slam Dual Chop Detect
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Pokémon Trainer Brendan / May	Swellow	Wailord	Breloom	Blaziken
Items	Level 37	Level 37	Level 37	Level 39
	Guts	Water Veil	Effect Spore	Blaze
	Attacks: Double Team Aerial Ace Quick Guard Agility	Attacks: Rest Brine Water Spout Amnesia	Attacks: Counter Mach Punch Force Palm Mind Reader	Attacks: Quick Attack Bulk Up Blaze Kick Focus Energy
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Pokémon Trainer Brendan / May	Swellow	Breloom	Magcargo	Swampert
Items	Level 37	Level 37	Level 37	Level 39
	Guts	Effect Spore	Magma Armor	Torrent
	Attacks: Double Team Aerial Ace Quick Guard Agility	Attacks: Counter Mach Punch Force Palm Mind Reader	Attacks: Flame Burst Rock Slide Lava Plume Amnesia	Attacks: Mud Bomb Rock Slide Protect Muddy Water
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item

Location: Sootopolis City

Your next encounter with your rival is in Sootopolis City when the Primal Pokémon have awakened. They will turn up in Sootopolis to give you words of encouragement, calling you the best friend that they have had. Afterwards, they will thank you and advise that you take a break.

Location: Pokémon League

After you have defeated the Pokémon League Champion, your rival will appear with Professor Birch. They have come to give you advice for your battle with the Champion, but were a little too slow in providing it. They will congratulate you and, during the credits, ride back to Littleroot Town with you. However, in the first time you play the credits, when your characters reach Route 103, your rival will challenge you once more, for old time's sake, and this time they have a Mega Evolution as well.

Pokémon Trainer Brendan / May	Swellow	Raichu	Magcargo	Wailord	Sceptile
Items	Level 48	Level 48	Level 48	Level 48	Level 50
	Guts	Static	Magma Armor	Water Veil	Overgrow
	Attacks: Aerial Ace Quick Attack U-turn Steel Wing	Attacks: Thunder Wave Thunderbolt Quick Attack Light Screen	Attacks: Earth Power Lava Plume Body Slam Rock Slide	Attacks: Surf Heavy Slam Bulldoze Ice Beam	Attacks: Leaf Blade X-Scissor Dual Chop Night Slash
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: Sceptilite

Pokémon Trainer Brendan / May	Swellow	Raichu	Wailord	Breloom	Blaziken
Items	Level 48	Level 48	Level 48	Level 48	Level 50
	Guts	Static	Water Veil	Effect Spore	Blaze
	Attacks: Aerial Ace Quick Attack U-turn Steel Wing	Attacks: Thunder Wave Thunderbolt Quick Attack Light Screen	Attacks: Surf Heavy Slam Bulldoze Ice Beam	Attacks: Seed Bomb Force Palm Venoshock Rock Tomb	Attacks: Blaze Kick Brick Break Quick Attack Shadow Claw
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: Blazikenite

Pokémon Trainer Brendan / May	Swellow	Raichu	Breloom	Magcargo	Swampert
Items	Level 48	Level 48	Level 48	Level 48	Level 50
	Guts	Static	Effect Spore	Magma Armor	Torrent
	Attacks: Aerial Ace Quick Attack U-turn Steel Wing	Attacks: Thunder Wave Thunderbolt Quick Attack Light Screen	Attacks: Seed Bomb Force Palm Venoshock Rock Tomb	Attacks: Earth Power Lava Plume Body Slam Rock Slide	Attacks: Earthquake Muddy Water Rock Slide Brick Break
	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: No Item	Hold Item: Swampertite

Location: Littleroot Town

When you start the Delta Episode, you will soon learn that your rival has been attacked and that their Key Stone has been stolen by a mysterious female. During the Delta Episode, it is your task to solve it. Once the Delta Episode is over, you take the Pair of Tickets given to you by Norman and go with your rival to Mossdeep Space Center to watch the Litleonids Meteor Shower. A cutscene appears with you and your rival having fun in the Mossdeep City before it ends and the Delta Episode ends with it..