Side Note: Some Pokemon will have parenthesis next to their name either saying what game they originate from if they are not originally from the said game or that they have been used in a previous game which is marked by "Veteran". I went through Colosseum two times. The second time is listed separately. My first run throughs of Colosseum and XD are combined.
Mew, Fluff, Selli, Tolixic, Asorn, Moltres
Boops, Lreonde, Lurix, Xoryian, Denlow, Morrow
Colosseum: Emalion and Aliscaban
XD: Erin, Karen, and Wuffy
Sappy, Kuval, Afelli, Hriel, Wrale, Yirse
Inelyo, Bakoryn, Zyolis, Noret, Buue, and Zapdos
Nuule, Goreya (Colo), Jyesis, Articuno (XD), Wuffy (Veteran), Qaersi (XD)
Ralika (XD), Taleie, Voritoe, Arcera, Fluou
Risaie, Saiylia, Multarso (XD), Wesya (Colo), Axeye, Woyeke
Opuffy, Fieji, Tehlon
Sairan, Vully, Untie, Dintneo, Fanita, Zepita
Necra (Colo), Inelyo (Veteran), Meloetta (White), Kyflison, Reyion
Karen (Veteran), Opuffy (Veteran), Reyion (Veteran), Phione, Hinlolyn, Wuol (?)(SoulSilver)
Funny, Jyesis (Veteran), Bakoryn (Veteran), Meloetta (Veteran), Elious (XD), Duylia
Drual, Orya, Missala, Knede, Sorn, Berila
Rufeso, Catresla, Xyllae, Foretyn, Aloa, Dakufinare
Dimoce, Sway, Furio, Johlie, Kralie, Icayl
Cordula, Prilie, Templer, Edame, Arashi, Enamorus