Researched by: crinos

The Official Site

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Information Resources

Wikipedia

ffinsider: List of Heartless

Kuponet: heartless list

Results of CBUB User Discussions

Lose against Link (118 to 618)
Lose against Pokemon (21 to 39)
Lose against Teen Titans (19 to 77)
Lose against Dante (21 to 93)
Lose against The Great Cornholio (52 to 56)
Lose against The Nobodies (38 to 48)
Lose against The 300 Spartans (31 to 101)
Lose against Prince Zuko (47 to 59)
Win against Care Bears (63 to 49)
Win against Foster's Home for Imaginary Friends (52 to 44)
Lose against W.I.T.C.H. (43 to 47)
Lose against Captain America (10 to 68)
Lose against The Muppets (43 to 54)
Lose against Edward Elric (31 to 73)
Lose against Dragon Quest 8 Team (40 to 59)
Lose against Luigi (28 to 71)
Lose against Rogue Galaxy Group (24 to 48)
Lose against Meta Knight (13 to 48)
Win against Justice League Unlimited (138 to 113)