Skateboard Actyl

The Skateboard Actyl is a skateboarding dinosaur from the Daring Dinos Adventurers line released by Maeritus in 1993. I think the card back lays it all out pretty clearly:

Daring Dinos are mutant dinos that came to life when a mad scientist accidentally went back in time to the Jurassic Period and the monster period simultaneously when he pushed the wrong button on this time machine.

There you have it - pretty straight forward.

Robbie Sinclair

Robbie Sinclair, older brother on the 90s TV show Dinosaurs. There is an older figure of Robbie with skateboard but this is a 2020 Funko Pop figure.

 

Buzz Lightyear & Rex

Buzz Lightyear & Rex riding tandem from Toy Story 2 (1999). It looks like this was a pull back or rev up skateboard but whatever internal mechanism once existed is done for and the wheels are just free spinning now, like a real skateboard I guess.

 

Edmontonia

An edmontonia is a dinosaur that looks a bit like the more well known ankylosaurus. This dude is a figure from Disney's T-Rex cafe.

Schöller Dinos

These dinos were made be Schöller. They made a bunch of mini dinosaur figures, some realistic and some a bit more rad.

Wafflesaurus

49% waffle, 51% dinosaur, 100% skateboarder. This Eggo dinosaur is printed on a floppy rubber frisbee from 1992. I'm not sure if he is actually called a Wafflesaurus but it seems like he probably is. 

Dino

This Dino figure is from 1991, back when cereal still had prizes inside. He came in boxes of Fruity Pebbles and probably Cocoa Pebbles and maybe even the short-lived Dino Pebbles, which featured dinosaur shaped marshmallows. In addition to skateboarding, there were also skiing and rollerblading figures. Since they couldn't make pads or helmets in the Stone Age, Dino has to settle for turtle shells.

Wacko-saur

This card is part of a series called Wacko-saurs, a cheap Garbage Pail Kid ripoff that put dinosaurs in wacky, or in this case radical, situations. As with GPK cards, this is a sticker and the back is 1/9th of a larger graphic (in this case it appears to be a larger version of the same graphic). Also keeping to the GPK model, Skate KATE shares her likeness with her twin, SCOTT Board.