Because…jeez. I’m sorry but right at this moment i am not digging this design. Even with all the NYOOM I’m sure he will get, plus the added benefits and stat changes. This is basically me trying to justify this mega evolution to myself.
So behold, my longshot!
The basic idea is that when Salamence is exposed to the radiation of Salamencite, it undergoes a massive change like all pokemon capable of mega evolution do. In Salamences case, its body becomes more compact and its wings increase in size by a colossal amount. This gives the pokemon a massive boost in speed and the height at which it can ascend too, along with prolonging the amount of time it can send in the air without rest.
At these new heights, Mega Salamence plummets to the ground at phenomenal speeds, dive-bombing in the position you see above. This is when another one of it’s evolutionary traits reveals itself. The Pokemon has sprouted a line of razor-sharp spines that grow on the skin of its wings, effectively functioning as a blade as it flies past, allowing it to slice through enemies, trees, and even rocks if they gain enough speed on their descent.
From this attack, the pokemon swoops downwards before pulling up, rising high on its massive wingspan again to position itself to attack again.The manoeuvrability, sheer speed and power that are granted to this pokemon upon mega Evolution are exceptional, meaning that it is capable of gliding mere inches above the ground as it dive-bombs its opponents.
So yeah, have a mini Dex entry with it, but the idea is that the pose you see above is its ‘attack’ form that it uses to cut through things. think like the Timberjack from How to Train Your Dragon. It’s full of terrible reasoning and its VERY far fetched, but i would be really interested to see what other people think could work.