This originally had a different yet still Bug-related ability, but then I realized that if this somehow won, the more general ability would be locked behind a rather specific name that couldn't be easily used by other mons in this mod if other people wanted to use it. As such, I decided to change things a bit and ended up effectively ripping off Sawsbuck-Spring-Mega's Spring Fever ability as I focused more on Zebstrika's rage. Whoops? (I guess I'll credit ViZar here for thinking up that ability before I forget again. So, uh, thanks, ViZar.)
Flavor-wise: [Insert "dark horse" puns here.] In continuing my usual "look at the Pokédex entries I usually completely ignore and don't take seriously since no one should" methodology for these, I was surprised to see that half of Zebstrika's entries focus on how ill-tempered it is. That's generally something you see with only Dark types or Fire types from what I've noticed--maybe some of the more aggressive Fighting types. Given that becoming Fire would both be even more random than becoming Dark as well as step on regular Rapidash, who is also in this very same slate, I decided to go with Dark (since I also didn't want to go Fighting). Rapidash also being in this slate is part of why I decided to make Zebstrika more special attack-oriented (which is part of why I dind't go Fighting either) even though that required swapping its attacking stats.
As for the seemingly random anti-Bug ability, when looking up
the actual real-life animal of the zebra, I was reminded that of the many theories for why they are striped in the first place, the one that seems to have most consensus still is that the stripes are to confuse and ward away flies. Between the bad temper angle, even this mod surprisingly having no anti-Bug ability as of yet, and personally being tired of pivot moves, of which U-Turn and Volt-Switch were the original versions of (ignoring Baton Pass), the ability and the name came to me rather quickly after I put my original ability aside.
Movepool-wise: I guess I should start by addressing the hypocrisy of saying I'm tired of pivot moves only to give two mons in a row in one slate pivoting moves--technically three since last slate ended with my Empoleon-Mega getting Flip Turn. Here
Parting Shot seems both on flavor and decently fine, especially since I gave Zebstrika
Work Up instead of Nasty Plot as I was initially going to do. The hypocrisy is admittedly a bit amusing in this instance, but I actually wouldn't have indulged in it at all if Zebstrika didn't already get Volt Switch anyway.
Parting Shot also seems fine given Soundproof Kommo-o already seemed at least somewhat viable in the current Megas for All meta from what little I've played of it via both tours over the last weekend, especially with all of the Acid Rock lurking around thanks to Toxtricity-Lowkey-Mega being so good--we did it guys! (There's also just something very amusing to me about the mental image a zebra cursing you out as it prances it off to send someone else to destroy you.)
As for its other moves,
Dark Pulse is needed (special) STAB since otherwise it would be stuck with only Hidden Power Dark and, of all things, Pursuit and Snatch.
Knock Off is also for STAB but mostly for screwing over Blissey and Chansey due to lowered Atk.
Rising Voltage is just something that all Electric mons get now, though getting that is part of the reason why I ended up making sure its SpA was below 130 even though it doesn't automatically set Electric Terrain. The other part for this and for getting
Work Up instead of Nasty Plot is just because of how high its Speed ended up being due to not wanting to dump that much into bulk--it's already bulkier than Manectric-Mega now, which is also amusing. (I just wanted to stick to Zeraora while also not obviating Boltund-Mega's speed tier, so they tie and Boltund-Mega kind of beats this Zebstrika-Mega amusingly due to Fairy type.) [/amusing]
Mechanic-wise: The dark elephant in the room is what becoming part-Dark does for this both positively and negatively--I swear that's not an electricity pun. When it comes to the positives of Dark typing for Zebstrika-Mega, it's actually the third most effective typing combination with Electric as far as (neutral) coverage goes. The only types better at complimenting Electric are Ice, which has horrific weaknesses and a singular crappy resist, and Ghost, which would be weird to randomly add and likely screw over Rotom-Mega down the road with this becoming a special attacker. (For the record, I'm not concerned with screwing over Morpeko-Mega down the road just because that seems likely to end up a physical attacker since Aura Wheel is physical.)
With Dark type, unlike with Ice or Ghost, you get actual resists while still getting at least one immunity even ignoring Buzz Off! effectively making this Zebstrika-Mega also immune to Bug. Being newly resist to Shadow Sneak and Sucker Punch is pretty nice when you're also immune to First Impression (from things other than Haxorus) even you normally wouldn't be, even if becoming weak to Mach Punch is an unfortuante downside. In a weird way, however, becoming Dark makes this easy to place on Psychic Terrain teams as well, which stops Mach Punch dead for you anyway as well helps Zebstrika-Mega's teammates bully Fighting types.
Most importantly, however, as noted above Zebstrika is now resistant to both of the most common pivot moves while also getting STAB on moves that super effectively hit the most common Flip Turn-or-Teleport-using mons. This leaves only opposing Parting Shot users as the mons that can most readily pivot out against it "safely".
Still, it's not like it's all sunshine since even with Buzz Off! activate, this Zebstrika-Mega is now weak to Fighting and Fairy moves in addition to Ground and all hazards and all damaging weather. That's not great, especially with no recovery and with the unfortunate tendency of many Fairy types to have great SpD. At least you can pivot out of them easily, but it's still annoying for Zebstrika-Mega.
Finally, the most subtle downside to this Zebstrika-Mega is that it can't use Signal Beam (or Hidden Power Bug) to hit the relatively few mons that do still resist its new STAB combination--largely other Dark types--since Buzz Off! will activate on itself too. Most of those mons are hit reasonably well by Overheat, but it's certainly still a downside, especially when Hydreigon and Kommo-o are exceptions to that--not that Signal Beam hits Kommo-o well either.
Mega Rapidash @ Rapidashite
Mega Zebstrika
Mega 
