Yeah, try reseting a match whenever you use the Gamepad.
Also, the PAL version gets better Boxing Ring names
[spoiler]
Mario:
Smashes Bricks With His Fists
Green Mario:
Lean, Green Fighting Machine
Princess Peach:
Princess of The Mushroom Kingdom
Bowser:
King of The Koopas
Yoshi:
He's Not Yolking Around
Rosaluma:
Cosmic Travelers
Bowser Jr.:
Like Father, Like Son
Larry:
Leader of The Seven Minions
Roy:
Our Boy
Wendy:
Bold, Bossy and Big-Headed
Iggy:
The Laughing Prankster
Morton:
He'll Make You See Stars
Lemmy:
Let's Get Wacky
Ludwig:
Pompous Prodigy
Wario:
Scoundrel With a Fart of Gold
Donkey Kong:
King of the Jungle
Diddy Kong:
Trigger-Happy With his Peanut Popgun
Mr. G&W:
Master of Two Dimentions
Lil' Mac:
The Only Numbers he Knows is One-Two
Link:
Hero of Hyrule
Zelda:
Hyrule's Wise Princess
Sheik:
A Sheikah Shrouded in Mystery
Ganondorf:
The King of Evil
Toon Link:
Wave-Riding, Wind-Waking Warrior
Samus:
Bounty Hunter Extraordinaire
Zero Suit Samus:
Low Armor, High Agility
Pit:
Lady Palutena's Captain of the Guard
Palutena:
Goddess of the Light
Marth:
The Legendary Hero-King
Ike:
The Radiant Hero
Robin:
Tome-Toting Strategist
Duck Hunt:
The Most Unlikely of Partnerships
Kirby:
Gritty in Pink
King DD
Says He's King, And That's That
Metaknight:
The Masked Swordsman
Fox:
Never Gives Up! Trusts His Instincts!
Falco:
Proud Space Ace
Pikachu:
The Electric Mouse Pokemon
Charizard:
Blazing Fury
Lucario:
Exudes Power
Jigglypuff:
The Delightful Balloon Pokemon
Greninja:
The Unpredictable Ninja Pokemon
R.O.B.:
Robotic Obliterating Buddy
Ness:
The PSI Powerhouse
Cpt. Falcon:
Supersonic F-Zero Pilot
Villager:
Mayor of Smashville
Olimar/Alph:
Veteran Astronaut
(Alph) Novice Explorer, Engineering Pro
Wii Fit Trainer:
She'll Make You Feel The Burn!
He'll Blast Your Core!
Shulk Shogan:
Has Visions of Victory
Dr. Mario D.D.S.:
Fists Full of Medicine
Pitoo:
Dark-Winged Doppleganger
Lucina:
Defiant of Destiny
Pac Man:
Ghost-Gobbler
Megaman:
The Blue Bomber
Sonic:
Speed Is His Game
Miis:
The Brawler of Many Faces
The Swordsfighter of Many Faces
The Gunner of Many Faces
[/spoiler]
Also, the PAL version gets better Boxing Ring names
[spoiler]
Mario:
Smashes Bricks With His Fists
Green Mario:
Lean, Green Fighting Machine
Princess Peach:
Princess of The Mushroom Kingdom
Bowser:
King of The Koopas
Yoshi:
He's Not Yolking Around
Rosaluma:
Cosmic Travelers
Bowser Jr.:
Like Father, Like Son
Larry:
Leader of The Seven Minions
Roy:
Our Boy
Wendy:
Bold, Bossy and Big-Headed
Iggy:
The Laughing Prankster
Morton:
He'll Make You See Stars
Lemmy:
Let's Get Wacky
Ludwig:
Pompous Prodigy
Wario:
Scoundrel With a Fart of Gold
Donkey Kong:
King of the Jungle
Diddy Kong:
Trigger-Happy With his Peanut Popgun
Mr. G&W:
Master of Two Dimentions
Lil' Mac:
The Only Numbers he Knows is One-Two
Link:
Hero of Hyrule
Zelda:
Hyrule's Wise Princess
Sheik:
A Sheikah Shrouded in Mystery
Ganondorf:
The King of Evil
Toon Link:
Wave-Riding, Wind-Waking Warrior
Samus:
Bounty Hunter Extraordinaire
Zero Suit Samus:
Low Armor, High Agility
Pit:
Lady Palutena's Captain of the Guard
Palutena:
Goddess of the Light
Marth:
The Legendary Hero-King
Ike:
The Radiant Hero
Robin:
Tome-Toting Strategist
Duck Hunt:
The Most Unlikely of Partnerships
Kirby:
Gritty in Pink
King DD
Says He's King, And That's That
Metaknight:
The Masked Swordsman
Fox:
Never Gives Up! Trusts His Instincts!
Falco:
Proud Space Ace
Pikachu:
The Electric Mouse Pokemon
Charizard:
Blazing Fury
Lucario:
Exudes Power
Jigglypuff:
The Delightful Balloon Pokemon
Greninja:
The Unpredictable Ninja Pokemon
R.O.B.:
Robotic Obliterating Buddy
Ness:
The PSI Powerhouse
Cpt. Falcon:
Supersonic F-Zero Pilot
Villager:
Mayor of Smashville
Olimar/Alph:
Veteran Astronaut
(Alph) Novice Explorer, Engineering Pro
Wii Fit Trainer:
She'll Make You Feel The Burn!
He'll Blast Your Core!
Shulk Shogan:
Has Visions of Victory
Dr. Mario D.D.S.:
Fists Full of Medicine
Pitoo:
Dark-Winged Doppleganger
Lucina:
Defiant of Destiny
Pac Man:
Ghost-Gobbler
Megaman:
The Blue Bomber
Sonic:
Speed Is His Game
Miis:
The Brawler of Many Faces
The Swordsfighter of Many Faces
The Gunner of Many Faces
[/spoiler]