Paper Mario/Walkthrough

Eldstar

 * Chapter Obtained: Chapter 1: Storming Koopa Bros. Fortress
 * Power
 * Focus: Boosts Star Energy.
 * Refresh: Replenishes 5 HP and 5 FP. Star Power Needed: 1

Mamar

 * Chapter Obtained: Chapter 2: The Mystery of Dry Dry Ruins
 * Power: Lullaby: Puts enemies to sleep.
 * Star Power Needed: 1

Skolar

 * Chapter Obtained: Chapter 3: The "Invincible" Tubba Blubba
 * Power: Star Storm: Decreases enemies' HP by 7.
 * Star Power Needed: 2

Muskular

 * Chapter Obtained: Chapter 4: Trials in the Toy Box
 * Power: Chill Out: Lowers enemies' attack power by 3.
 * Star Power Needed: 2

Misstar

 * Chapter Obtained: Chapter 5: Hot, Hot Times on Lavalava Island
 * Power: Smooch: Replenishes 20 HP.
 * Star Power Needed: 3

Klevar

 * Chapter Obtained: Chapter 6: Dark Days in Flower Fields
 * Power: Time Out: Immoblizes all enemies
 * Star Power Needed: 2

Kalmar

 * Chapter Obtained: Chapter 7: A Star Spirit On Ice
 * Power: Up and Away: Turns enemies into stars, knocking them out.
 * Star Power Needed: 2

Ultimate Star Spirit Power

 * Chapter Obtained: Chapter 8: A Star-Powered Showdown!
 * Star Beam: Used to negate the effects of the Star Rod. After Peach and Twink defeat Kammy, it is upgraded to Peach Beam as Kammy uses the device to increase Bowser's power.

Goomba King and Goomba Bros.
Goomba King's stats: HP: 10, Attack: 1, Defense: 0 Goomba Bros. stats: HP: 2, Attack: 1, Defense: 0

Koopa Bros. and Bowser???
Bowser???'s stats: HP: 10, Attack: 1, Defense: 1 Koopa Bros. stats: HP: 5 of each, Attack: 1, Defense: 1

Tutankoopa and Chompy
Tutankoopa's stats: HP: 30, Attack: 3, Defense: 0 Chomp's Stats: HP: 4, Attack: 3, Defense: 3

Tubba Blubba and his heart
Tubba Blubba's stats: HP: 10, Attack: 4, Defense: 0 Heart's Stats: HP: 50, Attack: 6, Defense: 0

Shy Guy Army
Shy Squad's stats: HP: 15, Attack: 1, Defense: 0 Stilt Guy's stats: HP: 7, Attack: 4, Defense: 0 Shy Stack's stats: HP: 10, Attack: 1, Defense: 0 General Guy's stats: HP: 30, Attack: 4, Defense: 2

Lava Piranha and the Lava Buds
Lava Piranha's stats: HP: 40, Attack: 5 (normal), 7 (on fire) Lava Buds' stats: HP: 8, Attack: 4 (regular only), Defense: 0 Petit Piranhas' stats: HP: 1, Attack: 6, Defense: 0

Huff N. Puff and the Tuff Puffs
Huff N. Puff's stats: HP: 60, Attack: 5, Defense: 0 Tuff Puffs' stats: HP: 1, Attack: 2, Defense: 0

Crystal King and the Crystal Bits
Crystal King's stats: HP: 70, Attack: 6, Defense: 2 Crystal Bits' stats: HP: 1, Attack: 4 (basically, when the Crystal King swallows them and spits them at Mario), Defense: 0