Cell is the main villain in Saga 5 of Dragon Ball: SB and appears as a villain in Saga 6. He is quite similar to his Canon alternate but his forms vary.
Cell's imperfect form is similar to his Canon alternate.
When Cell absorbs Android 21, he evolves into this form which is far stronger than Semi-Perfect Cell. He is quite similar in appearance but has blue skin instead of the white. In this form, he is equal to Super Vegeta.
This is Cell's Ultimate Form when he absorbs Android 22. He gets unlimited power and seemingly stronger than Super Saiyan 2 Tomoto who was presumed to be 10 times stronger than Super Saiyan 2 Gohan.
Ki Blast - The most basic wave of energy.
Fiery Ki Wave - Ultimate Cell's signature move, equivalent to Father-Son Kamehameha.
Blazing Dual Missiles - Cell's more stronger moves and has the power to stun anybody for a couple of hours. The missile's impact causing a massive fire.
Rapid Fiery Ki Wave - Fiery Ki Waves fired in succession, causing massive damage.
X - Blast - An 'X' Shaped wave of Ki, blasting the opponent and slicing them in the shape of an 'X'.