Pokemon Wild Kratts Blue Creature Power Suit - Large

Is this bigger than the 4-6x size?

I am so confused. what does this do? it can't just be a vest and gloves for $30! what happens when you get a creature power disc to add to it?

Do they have this in adult size?

The description states it includes a "power disc holder" - is there one included and is it the same thing as in the wild kratts adventure set?