Is this the toughest battle in an official Pokémon game?

It's pretty easy if you try

>>29861385
you can say that about anything tho

>>29861399
That's true. I just remember it not being too much of a problem. Weren't Zekrom and Reshiram worse?

>>29861078
Yes, but I hear the others later are even worse. Mewtwo is one of the first you unlock

The most nightmare battle I've ever had in a Pokemon game indeed.

>>29861078
>>29861447
Everything was pretty easy with Chandelure spamming memento and curse.

>>29861533
Mewtwo can be accessed at only gold rank but no other bosses have a second phase that fully restores them or a move that heals over 900 HP.

>Mewtwo used Recover!

Just go with Shedinja and you completely break the battle

>What is curse
He lasted 1 min for me

>>29861585
Also disable for Mewtwo

>PMD

no

>>29861713
Kill yourself