6th Gen One mega only

Probably something like Mega Kangaskha, or Heracross. I liked how megas gave some forgotten pokemon some love and make them viable. Probably lean more towards Kanga though because of how broken the mega is.

I suppose it would be either Mawile, Scizor, Pinsir or Diancie. I remember trying quite a bit making a Mega Diancie team when I was still into competitive. So I'll pick that one.

I, obviously, would have to go with Ampharos. I was so happy when my favorite baby got a mega evolution!

Mega Lucario
Then mega salamence as a close second xD

Blaziken is most probably my favourite non-legendary pokemon. So I'll go for mega blaziken with Speed boost 😎.

Mega Ampharos~!

Gotta love my long haired queen!

Mawile.

I don't like how Mega evolution was handled for the most part, but in this case it made the difference between a Pokémon with a great design and typing being just a Pokédex filler and being an actually awesome addition to your team.

Ah this is a tough one. There's so many that gave crucial buffs and type changes, like Audino, Sabelye, Mawile. I think if I only had one for my actual team though my fav would be Venusaur. Thick fat is so good for it.

Joins the Mawile train. Liked it on a Trick Room doubles team. Cannot go too wrong with Intimidate.

Also throwing in support to Ampharos, Audino, Altaria, Mawile, and Absol (clearly Pokémon whose names start with A are the best fufufu). They're all really cool/beautiful even if Diancie is my #1!

Since Absol is my favourite pokemon, I'll have to go with Mega Absol. Although I do wish it got an additional typing, I still love the design. :)

Mega Gyarados