It seems like a few mons could definitely use evos/prevos, but I don't feel like Absol or heracross need an evo. Prevos maybe, but look at there stats Absol has the strongest priority in the game, do to its 130 base attack; yes it's speed isn't great but it's raw power is that of a fully evolved mon. Heracross is in the same boat 125 attack is GOOD ENOUGH; yes I know he's not OU anymore, but he's still a monster as any UU player can attest.
I'm a big fan of the relicanth stronger prevo idea from a few pages back; it's an awesome idea. I read somewhere a while ago that the ancient proposed fish I can't spell is estimated to have the strongest bite of any animal ever, so possibly a candidate for a pretty solid attack stat.
In conclusion prevos for skarm and maybe Absol, and evos for dunsparce, farfteched, masquarian ect.
SS FC: 3439 0156 2549
White FC:1549 5311 6603