Paper Mario/Companions

Goombario
Goombario is a goomba that knows a lot about the Mushroom Kingdom and all who inhabit it. You can use him outside of battle to tell you where you are, or what you need to do next. In battle he is able to tackle, or tattle on the enemy, revealing it's HP (hit points).
 * Headbonk (0 FP): Bonks single enemy, like Mario's jump.
 * Tattle (0 FP): Uncovers enemy's description and stats. Outside of battle, he can tell you about the people you meet and the places you visit.
 * Charge (1 FP): Boosts Headbonk attack by 2.
 * Multi-bonk (3 FP): Much like Mario's Power Bounce, bonks an enemy multiple times until he misses the action command.

Kooper
Mario meets Kooper the Koopa after his shell was taken by the fuzzies. Once you return his shell he joins you. Kooper is able to launch his shell (with the help of Mario) to destroy obstacles, reach far away switches, or grab you something far away that Mario cannot reach.
 * Shell Toss (0 FP): Attacks one enemy. Outside of battle, he can use this attack to flip switches, grab items and attack enemies.
 * Power Shell (3 FP): Attacks all enemies.
 * Dizzy Shell (4 FP): Makes enemies dizzy.
 * Fire Shell (5 FP): A fiery move that attacks all grounded enemies.

Bombette
Bombette is a Bob-Omb trapped in the prison of the Koopa Bros. fortress, and with Mario's help, she frees herself and the other Bob-Ombs and joins Mario's party. She can use her exploding power to destroy cracked walls, as well as activating switches and stunning enemies in battle. Her primary attack is a body-slam, but by leveling up, she can acquire a variety of explosive attacks.
 * Body Slam (0 FP): Charges at one grounded enemy.
 * Bomb (3 FP): Attacks one grounded enemy. Outside of battle, she can use this attack to flip switches, blow up fake/cracked walls and attack enemies.
 * Power Bomb (6 FP): Attacks all grounded enemies.
 * Mega Bomb (8 FP): Attacks grounded and airborne enemies.

Parakarry
Parakarry is the Mushroom Kingdom's friendly mail Koopa. Once Mario Finds his missing letters, he will join the party and help Mario on his quest. He can fly Mario over short gaps, and dive-bomb enemies in battle. As you find letters laying around the Mushroom Kingdom, you can find the correct recipients and deliver them, often for rewards.
 * Sky Dive (0 FP): Kicks one enemy while airborne.
 * Shell Shot (3 FP): Charges at one enemy while airborne.
 * Air Lift (3 FP): Lifts enemies out of battlefield. Outside of battle, Mario can use this attack to hover over short distances due to his (Mario's) weight.
 * Air Raid (6 FP): Flies around like crazy, inflicting damage to all enemies.

Lady Bow
Bow is a Boo Princess who lives in Boo's Mansion, deep within Forever Forest. Her guardian is Bootler, the ghost of a butler. She holds a Star Spirit, Skolar, hostage in order to convince Mario to help her defeat the "Invincible" Tubba Blubba. The Boos have been terrorized by Tubba Blubba for quite a while, as Tubba's favourite meal are Boos. She agrees to go with Mario, against Bootler's will. Using her stealth skills, she helps Mario sneak into Tubba Blubba's Castle in Gusty Gulch. Upon Tubba's defeat, she gets Mario to let him accompany him for the remainder of the quest. She is very stubborn and loves getting things her way. Abilities including smacking enemies, with or without her precious fan, stealth, and scaring the heck out of enemies.
 * Smack (0 FP): Smacks an enemy 5 times.
 * Outta Sight (2 FP): Makes Mario invulnerable to attacks. Outside of battle, she can use this attack to protect Mario from damage.
 * Spook (3 FP): Scares enemies away from battlefield.
 * Fan Smack (5 FP): Smacks an enemy 5 times with her fan.

Watt



 * Electro Dash (0 FP): Attacks one enemy, ignoring enemy's defense value.
 * Power Shock (2 FP): Paralyzes single enemy.
 * Turbo Charge (3 FP): Temporarily boosts Mario's attack power.
 * Mega Shock (5 FP): Paralyzes all enemies.

Sushie



 * Belly Flop (0 FP): Hop on one enemy.
 * Squirt (3 FP): Shoots water at one enemy.
 * Water Block (3 FP): Boosts Mario's defense.
 * Tidal Wave (6 FP): Launches water attacks against all enemies

Lakilester



 * Spiny Flip (0 FP): Throws a Spiny Egg at one enemy.
 * Spiny Surge (4 FP): Throws a lot of Spiny Eggs at all enemies.
 * Cloud Nine (4 FP): Boosts Mario's evasion rate.
 * Hurricane (5 FP): Blows enemies out of the battlefield.