Says the fish who fears the E4 without even bein' in a moveset challenge. :P That, 'n I wish I was a 'Karp....
Solarbeam can replace Magical Leaf since Vileplume apparently can't learn it. Which means that Camerupt's fourth move will be Sunny Day. That is, if Vileplume has Chlorophyll.
Oh right, it's the only ability it can have. I don't keep track of this stuff sometimes.
That ain't how difficulty works. Takin' one or two moves 'n makin' it really bad just means I have one're two moves I won't use. I've got a whole 'nother team to make up for any of the Poke's shortcomings. You're not makin' the entire moveset bad by killin' off one or two moves, you're makin' it less good. Pokes with good dual STAB will still hold their weight 'n then some, which means it ain't much more of a challenge with a poor moveset anyways. The only time a bad moveset really is a challenge is when ya've got a really small team. Since my Challenge is a combined Nuzlocke, I sure as shit don't.
As I mentioned earlier, makin' bad movesets is not the point of a Moveset Challenge. It's t' make challengers use movesets they've never used before, strategies they're not used to, etc. Not make their Pokes halfway useless, we've the Unevolved Challenge for that. Rule 2 is there for a reason; if a Poke has no use for a move and would never/very rarely use it, that means the person who made that move selection is either lazy, or tryin' to make a bad moveset for whatever reason be it intentional or otherwise. Any intentional motivations for a lackluster moveset I particularly frown upon, 'less the challenger asks for it 'emself.
I don't really care what Camerupt gets 'sides it's dual-STAB obviously, for reasons stated above. But ya know me bro, a real stickler for everyone t' be followin' the rules. :P
Camerupt already evolved, it doesn't learn Double Edge. It's just a Strength with recoil anywho, so even if it could learn it, no.