Every move except Energy Ball, Solarbeam, the Drain attacks, GrassWhistle and Ingrain MIGHT work.
I doubt the health-restoring ones such as Leech Seed would have much effect though.
The spore based ones I don't know.
Because spores are fungi.
TOA used Bullet Seed
It's super effective
That image is just stupid.
Though, maybe a move like Wood Hammer would be easier to accurately replicate; just spawn a huge chunk of wood and beat someone with it.
Also, Grass Knot could be pretty useful.
Maybe Needle Arm could work, grow some thorns on your arm/wrist and *SMACK*
I'm just giving ideas for things Toa of Plantlife can do.