Wait, how can you not like Mega Manectric's design?!
It's a LIGHTNING BOLT. The electric blue fur + pale yellow blends so well! This is an INCREDIBLE design.
Dedenne, to me, looks like a cheap Korean knock-off of Pikachu. You know Ling-Ling from Drawn Together?
And Diggersby... at first I was like "Oh
god, what the hell is that thing?" Then I discovered that its big ears have muscular arms with hands on them, and learnt of its competitive viability. I was won over. ^_^
I don't care how ugly Diggersby is. Huge Power + STAB Earthquake, Quick Attack, U-turn, Ghost and Electric immunities, decent Speed. Really should be used more.
You have a good point about the coloration for Mega Manectric. It's more vibrant than his regular form, and the use of the three primary colors (don't forget his red claws,) makes things stand out. The lightning bolt part of his body is just so awkwardly shaped though. It's too thick, and takes away from a lot of his original design's majesty and sleekness. I would think that shape would greatly hinder his ability to move and function. It only gets worse if you think about what that stuff actually
is. It looks like armor, but if it is, what's it look like underneath? If it isn't armor, are they just giant misshapen flesh lumps, like a pointy camel with too many humps? Ew.
Too each their own, though. Speaking of...
i honestly think dedenne has potential.
If you have something more than a gimmicky doubles strategy to back up that thought I'd love to hear it. As it stands though Dedenne is 99% likely to be the most unusable Pokemon of the new generation. If you like Dedenne then that's all good and plenty, but his battle potential is right up there with the other failed Pikaclones.
Here are some damage calculations just to drive the point home. Keep in mind that Honkalculator does not include Parabolic Charge at the moment (which should speak volumes to it's usability,) and so I had to make do with a custom move set to 38 base power (to mimic the power drop from hitting multiple opponents in a double battle.) I also gave the Dedenne Choice Specs, maxed his SpA EV's and gave him Modest nature, so this is the most power you're getting from Parabolic Charge.
252+ SpA Choice Specs Dedenne (Move 1) vs. 4 HP / 0 SpD Scizor: 91-108 (32.2 - 38.2%) -- 95.5% chance to 3HKO
252+ SpA Choice Specs Dedenne (Move 1) vs. 4 HP / 0 SpD Terrakion: 82-97 (25.3 - 29.9%) -- guaranteed 4HKO
252+ SpA Choice Specs Dedenne (Move 1) vs. 4 HP / 0 SpD Starmie: 170-204 (64.8 - 77.8%) -- guaranteed 2HKO
252+ SpA Choice Specs Dedenne (Move 1) vs. 4 HP / 0 SpD Spinda: 112-133 (42.7 - 50.7%) -- 3.9% chance to 2HKO
252+ SpA Choice Specs Dedenne (Move 1) vs. 4 HP / 0 SpD Aegislash-Shield: 52-63 (19.8 - 24%) -- possible 5HKO
252+ SpA Choice Specs Dedenne (Move 1) vs. 4 HP / 0 SpD Unown: 133-157 (55.8 - 65.9%) -- guaranteed 2HKO
252+ SpA Choice Specs Dedenne (Move 1) vs. 4 HP / 0 SpD Blissey: 58-69 (8.8 - 10.5%) -- possibly the worst move ever
Note: I didn't even write that "worst move ever," thing. The damage calculator apparently just says that for weak enough moves now. =P
Seriously, I'm not trying to be mean here, but your Parabolic Charge idea isn't doing Dedenne any favors. You can argue for him design-wise or just like him regardless of what other people say (I love Sneasel, but I know he's not exactly the epitome of "usable," outside of Little Cup,) but I don't understand how you can argue for Dedenne having battle potential.