Oh, well I know the spark jump one, but I'll have to try the other one.

For the instant grab, you go just past the opponent, and grab immediately while you are turning around. As for the second one, you use his Down A in-Air, and as soon as you and your opponent hit the ground, you begin juggling them with his Down A kick, and you can complete the combo with a C-Stick once you've juggled them to the edge. This guy uses both frequently:
they can only be executed with the GC controller though

and there are several other things that GC users are enabled to do, but not us nunchuck users
