Pokemon in his team:

Mudkip-Mashstomp-Swampert
Nickname:Zuzu OT:Landon Gender:M
Nature:Impish Ability:Torrent Level:81
Attack:Water gun, mud slap, bide, mud shot, mud sport, earthquake, ice beam, dive, muddy water, protect, surf, rain dance, hydro pump, hydro cannon
As a Mudkip, Landon choose it as his starter and was given the name of 'Zuzu' because it makes a 'Zuzu' sound when sniffing. It evolves into Marshstomp while in Granite Cave and into Swampert while battling May's Grovyle at route 119. It shares a close bond along with Landon. It's ice beam makes a great lightning conductor that helps to conduct Nunu's electric attacks that knocks off Steven's Metagross. In Emerald Series, Zuzu knocks off the oppenent with a muddy water and helps to disperse the giant creature with a hydro cannon.

Zigzagoon-Linoone
Nickname:Nunu OT:Landon Gender:M
Nature:Quirky Ability:Pickup Level:77
Attack:pin missle, thunder, volt tackle, fury swipe, slash, covet, tail whip
Since it was a Zigzagoon, Nunu is one of the Pokemon given by Norman during his childhood and it learn a series of thunder attacks. It evolves into Linoone while in Granite Cave. Its pickup ability allows him to pickup item easily and somehow stealling things by using covet. In Emerald Series, Nunu helps Landon to contact Jordan for the latest news while its trainer was away. Later, it deliver a volt tackle to disperse the gigantic creature.
Tailow-Swellow
Nickname:Tatay OT:Landon Gender:F
Nature:Docile Ability:Guts Level:77
Attack:wing attack, double team, sky attack, aerial ace, steel wing, endeavor
Since young, this Tailow was given by Norman to Landon. Due to Norman's tough training, it has a very powerful sky attack. It evolves to Swellow after defeating Brawly. It shows its loyalty towards its trainer by taking him flying around the sky route. In Emerald Series, Tatay paired up with Wally's Flygon to break Guile's armor.

Wurmple-Cascoon-Dustox
Nickname:Tuttu OT:Landon Gender:M
Nature:Brave Ability:Shield Dust Level:75
Attack:string shot, poison sting, psybeam, mirror coat, reflect, light screen, barrier, silver wind, signal beam, psychic, moonlight
While at Petalburg Woods, this Wurmple got a liking towards Landon and save its trainer from Team Magma attack. It evolve into a Cascoon after defeating Team Magma at Petalburg Woods and again into Dustox after another defeat for Team Magma at Rustboro. It mostly use its barrier attacks to sheild and protect everyone from trouble. While battling against Brawly, it use moonlight to recover Tatay from injuries. As for Sidney's Absol, it finishes it with a powerful silver wind.

Oddish-Gloom-Vileplume
Nickname:Pupu OT:Landon Gender:M
Nature:Modest Ability:Chlorophyll Level:73
Attack:Solarbeam, Sleep powder, Poisonpowder, giga drain, petal dance
While at route 118, Landon caught this Oddish to send Wally's Ralts to attack a wild Pelipper. It evolves into a Gloom in a training with Flannery and into Vileplume after touching a Leaf Stone at Mt. Pyre. It somehow use its spores to counter attacks. While battling Phoebe's Dusclops, it use petal dance to restore and counter it.

Numel-Camerupt
Nickname:Ruru OT:Landon Gender:M
Nature:Quiet Ability:Magma armor Level:77
Attack:earthquake, flamethrower, rock slide, eruption, take down
While at Mt. Chimney, Landon caught this Numel to absorb the fire given out by Flannery's Torkoal. It evolve into Camerupt while battling Winona's Altaria with an eruption. It somehow use certain tricks to let a Pokemon stuck tight in his humps to deliver an eruption. While battling Glacia's Glalie, it use earthquake to counter Glalie's speed and use its humps to stuck Steven's Aggron horns.
Pokemon in his box:

Castform
Nickname:N/A OT:Landon Gender:M
Nature:N/A Ability:Forecast Level:50
Attack:Rain dance, hail, sunny day, weather ball
Landon rescue this Castform unders Winona's order in order to protect it from Team Magma. He then lend it to Jordan to battle the Battle Pyramid but it was knocked off with a blizzard from Regice.
Pokemon he had partner before:

Groudon
Nicname:N/A OT:Landon Gender:N/A
Nature:N/A Ability:Drought Level:N/A
Attack:N/A
Landon capture this Groudon after failing to stop it completely which Maxie suddenly use it to travel the past. Landon, however managed to release it and let it return back to its slumber.

Regirock, Regice, Regiseel
Nickname: N/A OT:Landon Gender:N/A
Nature:N/A Ability:N/A Level:N/A
Attack:N/A
Landon simply capture these Pokemon in the Sealed Chamber and release after several days.

Rayquaza
Nickname:N/A OT:Landon Gender:N/A
Nature:N/A Ability:Air Lock Level:N/A
Attack:N/A
Landon capture this Rayquaza in Sky Pillar by using a Master Ball. He then release it to stop Kyogre and release it back to the sky.