Pokemon/Monsters Inc

Version 1

 * Brock/Takeshi as Sulley
 * Ash/Satoshi as Mike
 * May/Haruka as Celia
 * Dawn/Hikari as Boo
 * Giovanni/Sakaki as Mr. Waternoose
 * James/Koijirō as Randall
 * Jessie/Musashi as Roz
 * Harley as George Sanderson
 * Wallace/Mikuri as Charlie
 * Gary/Shigeru as Needleman
 * Max/Masato as Smitty
 * Tracey/Kenji as Jerry
 * Professor Oak/Doctor Okkido as The Abominable Snowman

Version 2

 * Brock - Sulley
 * Ash - Mike
 * Bonnie - Boo
 * James - Randall
 * Giovanni - Mr. Waternoose
 * Misty - Celia
 * Officer Jenny - Roz
 * Butch - Fungus
 * Chili - Needleman
 * Cilan - Smitty
 * Don George - Jerry
 * Wulfric - The Abominable Snowman
 * Stephan - George Sanderson
 * Tracey - Charlie
 * Conway - Mr. Bile
 * Liza (Johto) - Mrs. Flint
 * Police Officers - CDA

Version 3

 * Carracosta as Sulley
 * Golem as Mike
 * Togepi as Boo
 * Floatzel as Randall
 * Darkrai as Mr. Waternoose
 * Diancie as Celia
 * Purugly as Roz
 * Amoonguss as Fungus
 * Charizard as Needleman
 * Dragonite as Smitty
 * Scizor as Jerry
 * Abomasnow as the Abominable Snowman
 * Crustle as George Sanderson
 * Tangrowth as Charlie Proctor
 * Empoleon as Mr. Bile
 * Froslass as Ms. Flint
 * Regirock, Regice and Registeel as the CDA

Version 4

 * Brock as James P. Sullivan
 * Ash as Mike Wazowski
 * Molly Hale as Boo
 * James as Randall Boggs
 * Giovanni as Henry J. Waternoose
 * May as Celia Mae
 * Jessie as Roz
 * Kenny and Barry as Smitty and Needleman
 * Butch as Fungus
 * Mr. Parker as Yeti (Abominable Snowman)
 * Cilan as Thaddeus "Phlegm" Bile
 * Iris as Ms. Flint
 * Professor Rowan as Jerry
 * Wallace as George Sanderson
 * Gary Oak as Peter "Claws" Ward
 * Tracey as Ted Pauley
 * Police Officers as the CDA

Version 5

 * Ash as James P. Sullivan
 * Max as Mike Wazowski
 * Vivi Winstrate as Boo
 * Trip as Randall Boggs
 * Paul as Henry J. Waternoose
 * Bonnie as Celia Mae
 * Jessie as Roz
 * Kenny and Barry as Smitty and Needleman
 * Gary Oak as Fungus
 * Mr. Moore as Yeti (Abominable Snowman)
 * Clemont as Thaddeus "Phlegm" Bile
 * Shauna as Ms. Flint
 * Professor Rowan as Jerry
 * Cilan as George Sanderson
 * Khoury as Peter "Claws" Ward
 * Drew as Ted Pauley
 * Police Officers as the CDA