>>58075412Most Mega Evolutions are designed as if they were legendaries, with the most powerful ones arguably superior to most legendaries. However, they have extra restrictions: both the team limit and the lost item slot. Most people would agree that Mega Charizard Y is a better Drought user than base Groudon and a better special attacker than Reshiram, but when you compare a weaker Mega Evolution like Ampharos with Reshiram, they feel to be in the same ballpark, with the restrictions being the main reason why Reshiram is definitely better. Dynamax and Tera, on the other hand, benefit those who can exploit these mechanics better, meaning usually the same legendaries that would stand on top anyway. You will be overwhelmed because there are essentially no restrictions to use them.