Guys, I just had an idea.

What if Ash Greninja's Battle Bond is a true Mega Evolution? We now know that Mega evolving is an unnatural, sometimes painful process where the Pokemon is overloaded with energy and gets roid rage. Maybe the Mega stones and rings aren't needed, like they're amplifiers that force it when it's not otherwise possible or something.

Half of the Mega stones are unavailable in SM. Maybe they're being phased out, and replaced with true Megas.

Here's my idea. No stone or ring needed. A mega becomes available once max happiness is reached. You can use a special ability capsule to change its ability to Battle Bond.

The activation conditions would be different for some. Offensive ones would trigger when a KO happens, like Greninja. Others, like Audino, would happen when its doubles teammate takes damage, maybe?

Their ability would probably be Battle Bond, or maybe it'd change. Not sure how it'd work. Losing Thick Fat would ruin Mega Veusaur.

They'd also gain an altered signature move. Just running some ideas:

These all transform when they KO something unless stated otherwise.

Salamence: Loses Aerilate, gets a 50% damage boost on Wing Attack instead.

Kangaskhan: Loses Parental Bond. Double Hit gets a damage boost on the first hit.

Venusaur: Activates when it take damage or is statused. Synthesis now heals status and gives Venusaur leftovers healing for 3 turns.

Blastoise: Water Pulse deals double damage.

Charizard-X: Outrage no longer locks in or confuses.

Charizard-Y: Flamethrower activates sunny weather? Not sure about this one.

Alakazam: Could do something with Psychic, maybe give it Mold Breaker effects or make it hit both opponents in doubles?

Gengar: Shadow Ball traps like Spirit Shackle.

Pinsir: Aerial Ace gets a damage boost.

Gyarados: Activates when Crunch is used, maybe? Not sure about this one.

Aerodactyl: Wing Attack gets a damage boost, or Head Smash loses its recoil.

Mewtwo-Y: Amnesia boosts Special Attack too.