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It really does look like a Luvdisc evo, doesn't it? I dunno... the fact that we've had no word on new evos so far with this gen makes me cautious about such things, but it just has so many similarities with Luvdisc...
Oh, and for anyone who cares... the name Mamanbou (ママンボウ) seems to be derived from manbou (翻車魚), the Japanese word for an ocean sunfish.