Android 17’s twin is the only female fighter in the game. Like her brother, 18 has a fair balance between beam and melee moves.
Super E-Ball (beam, 23cc, 30pow, 95acc)
Energy Slash (beam, 18cc, 25pow, 100acc)
Energy Slice (beam, 15cc, 20pow, 90acc)
Attack No.18 (melee, 19cc, 25pow, 100acc)
Lock On (item, 4cc, accuracy up, 100acc)
With Super E-Ball and Attack No.18, you’re pretty much covered, and if you like you can mix it up with Energy Slash. While Energy Slice is a card that only 18 can use, I don’t recommend it – you have better options.
Just like 17, this android can use Lock On but there is not much use to it, unless you really like Energy Slice.
As for 18’s battle strategy, I would suggest focusing mainly on Ki, with the occasional Attack No.18 to hopefully catch your opponent off guard.