I don't remember Tamers Beelzemon being particularly impressive until he got Blast Mode.
@TheBlackDragonz: Tamers, haven't got into Xros. :( He is in Blaster Mode(sorry if the image was misleading)
hmmm.. I'd have to go with Beelzemon BM with high difficulty as his blaster can do more damage and he is the most powerful form of Beelzemon.
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