Question

Will it give you Max Atk, +6? Or will it give you +5 Atk?
Same with Intimidate and Anger Point.

Answer 1

Belly Drum deducts one half of the user's maximum HP from its current HP and, in return, it maximizes the user's Attack stat by raising it up to +6 stages, even if the user's temporary Attack bonus stages were below 0 prior to using Belly Drum.

Bulbapedia

Anger Point maximizes the Attack stat of Pokémon with this Ability when they are hit by a critical hit.

Bulbapedia
In short: the attack will be maximized.

Answer 2

NO,
It Will Increase By 6, Still even though Intimidate Has
Happened. It Is Because It MAXES Out Attack, or else it's not worth
it losing The HP For the Move.

Hope I Helped

                      Pichu

Comments

Don't Ask About The Pichu Special Effect Thing ...

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I Don't Usually Add Sources Sorry !

Answer 3

Yes for +6, regardless of the stage:

http://bulbapedia.bulbagarden.net/wiki/Belly_Drum_(move)