If this was asked before tuesday, probably my response will be no. But now his mega got rebalanced with pretty decent skills so yes is worth to have one.
But remember, his mega now is better than his BM in anything.
BigTortoise (GDMO Leviamon)
Guild: Outragers - GuildMaster
39 Mercs - newest: BlackHayate, BkGabu 4/5 117% (Shiro, the Gabu got a brother xD)
Biggest: Kuwabara, Bear 5/5 126% (I think I'll stop fruit him)
Level Ranking: Kuwabara, Bear 5/5 126% Top 6; Odin, Goma 4/5 118% Top 8
First hatch: Undertaker, Drimo 4/5 118% (event); KuwagataX, Kune 4/5 119% (merc)
Luckiest: Destroyah, Kame 4/5 119% (2 normal core eggs)