Morgan is a chimera in species, lore, and gameplay. The tricks I've listed are directly from Morgan's Skate Club which is the origin of this character model, but feel free to customize however you please.

Recommended Tricks for Morgan
Any tricks that I couldn't find in reTHAWed will be listed as "-(BUTTON COMBO) = FREE SPACE (NAME OF ORIGINAL TRICK)" and can be substituted however you please.

Flips
-UP + FLIP = 360 shove-it
-UPRIGHT + FLIP = 180 Varial / -360- Varial (make sure to press flip twice!)
-RIGHT + FLIP = Heelflip/Double Heelflip
-DOWNRIGHT + FLIP = Heelflip Varial Lien (360 heelflip varial lien)
-DOWN + FLIP = Impossible/Double Impossible
-DOWNLEFT + FLIP = Varial Heelflip (UG2)/Laserflip (make sure to press flip twice!)
-LEFT + FLIP = Kickflip/Double Kickflip
-UPLEFT + FLIP = FREE SPACE (impossible cancel)

Grabs
-UP + GRAB = Madonna (TH1)
-UPRIGHT + GRAB = Indy Stiffy (TH2)
-RIGHT + GRAB = Indy Nosebone (TH1)
-DOWNRIGHT + GRAB = Japan Air (TH1)
-DOWN + GRAB = Tailgrab/One Foot Tailgrab (make sure to press grab twice!)
-DOWNLEFT + GRAB = FREE SPACE (superman)
-LEFT + GRAB = Method (TH1)
-UPLEFT + GRAB = Airwalk/Christ Air (make sure to press grab twice!)

Grinds
-Grinds are buggy/unpolished in MSC so go nuts!

Lip Tricks
-Morgan has been depicted doing Invert (DOWN + GRIND by default)

Special Tricks

In Morgan's Character Bio from MSC she aspires to be the next Tony Hawk so that said

-RIGHT, LEFT, GRAB = 360 Varial McTwist
-RIGHT, DOWN, GRAB = Indy 900
-LEFT, DOWN, GRAB = Endless Handflip
-UP, DOWN, GRIND = Spacewalk Wave

Any Special Moves that Tony Hawk has done in previous games are A-OK.

Replacement moves (meant to fill in for missing moves elsewhere)
-Kickflip Superman
	-Replaces her DOWNLEFT + GRAB from MSC

Lore Accurate Moves
-Chomp On This
	-Morgan's favorite food is pineapple pizza.
--Power Chord
--Guitar
--Faction Guitar Slide
--Headbangers Unite!
	-Morgan has been depicted playing guitar
-Wha Wha Whoops!
	-Morgan is a clumsy dork.
Fire Fire Fire
	-Morgan is canonically 1/4th dragon so her ability to breathe fire onto her board is activated by the power of Special!
		-I doubt she'd be able to breathe fire normally or intentionally otherwise.

Morgan is a chimera but doesn't know of what exactly, through the power of Special she gains access to any trick named after an animal as if by instinct (even though these tricks were created by human skaters). However:

Exceptions

-Beaver Blast
	-Crude euphemism for anatomy, not named after a rodent.
-Kickflip Dogpiss
	-She might look a bit like a dog but that's just indecent and out of character.
Spiderman Specials
--Spidey Grind
--Does Whatever a Spider Can
--Spidey Flip
	-Morgan is a chimera (a combination of multiple species) not a mutant.
Wolverine Specials
--Claw Punch
--The Claw Drag
--The Berzerker
	-Wolverine isn't even a wolverine smh.
-Lick It Up
	-That's not a prehensile chameleon tongue but a human tongue (specifically Gene Simmons')

Also Don't

-Ahhh yeahhh!
	-Morgan has body image issues due to bullying throughout her life. She'd never flaunt herself.