This sheet shows the known abilities of the X Tornado, along with a few that it could have.

Canon abilities:

X Cyclone: The X Tornado transforms into a walker, its 2 engines becoming its legs.

Battle Armor Mode: The X Tornado's engines become 2 arms, one with a shield and the other with a sword. Only used in episodes 29-30.

Laser: The X Tornado shoots a laser at its enemies.

Ring Shooter: The X Tornado shoots a power ring for Sonic to use. Mounted behind the front landing wheels.

Chaos Emerald Compartment: This comparment is used to store the Chaos Emeralds that Tails currently has.

Afterburner: Can be used to make the X Tornado fly faster.

Made up abilities:

Energy Cannon: The X Tornado can be modified with 2 energy cannons(one in each of its engines) to use the energy that is gained from the Chaos Emeralds to attack.

Medibot and Shieldbot: The X Tornado could deploy two of Tails' portable droids(from Sonic Chronicles: The Dark Brotherhood). Medibot heals allies, and Shieldbot protects them with a shield.

Deploy T-Pup: The X Tornado could be modified with a compartment that could transport T-Pup(Tails' robot dog from the Sonic comics). T-Pup could perform a variety of abilities, from scouting areas too small for the X Tornado to enter to repairing the X Tornado(like R2-D2 would with an X-Wing).

X Tornado - Sonic X/Sega
T-Pup Sonic/Archie/Sega