How to use the skateframe;

Gloom
slow baddies and heal goodies. Always use this before getting on your skateboard. Turn off and on when you get off of your skateboard.

Merulina;
gets you on the skateboard.

Aquablades
to deal damage to nearby baddies and smash boxes. Not needed, but handy.

Riptide
suck enemies into a bubble to group them or to make them easier to hit.

[Thief's Wit] and [Enemy Radar] can be swapped for what you like.