Possibly.
Let's look at Medicham's stats.
60/60/75/60/75/80
Mega Evolution: 60/100/85/80/85/100
Speed is its highest stat, and it gets increased even more in its Mega Evolution. However, if you want to use a physical Medicham, you could possibly use it as it increases your attack.
tl;dr: Not really, but you can use it if you want to.
