I think that pachirisu is a good startter for some decks but for others is inecesary:
*for magmortar is exellent
*for G&G is unecesary
it works well on decks that play diferrent lines of pokemon like hurricane and magmortar but for gardillade isn´t that usefull for G&G is better a absol
there are also powerfull decks that can beat magmortar even with pachirisu like houndoom/absol it´s a very good deck against magmortar and gardillade . i don´t say that pachi is overrated but it is only ussesfull in some decks
*for magmortar is exellent
*for G&G is unecesary
it works well on decks that play diferrent lines of pokemon like hurricane and magmortar but for gardillade isn´t that usefull for G&G is better a absol
there are also powerfull decks that can beat magmortar even with pachirisu like houndoom/absol it´s a very good deck against magmortar and gardillade . i don´t say that pachi is overrated but it is only ussesfull in some decks