Board Thread:General Discussion/@comment-26244866-20150531224124/@comment-26244866-20150623223910

Ghostkaiba297 wrote: Right, I forgot about "outside of the main story". (like Blaze is playable in the Free Mode of Sonic Riders: Zero Gravity) Actually, Cream is also playable in the Party Mode in Sonic and the Secret Rings (something I forgot to mention), making it nine games.

However, if not counting "outside of the main story" (and by main story, I mean the main story of the game, not the main Sonic series), Cream is playable in the games you mentioned as well as Sonic Battle, Sonic Chronicles and Sonic Free Riders, making it six, which is still more than Espio's playable appearances (all of the ones I listed are in the main stories of the games). However, if only counting main series games, both Espio and Cream are only playable in one game (Sonic Heroes).