There are quite a few characters that has their own unique abilities throughout the whole Dragon Ball series. Some of them are mostly forgotten due to their last appearance was on the original Dragon Ball.
Here's some example I can think of at the moment:
- Fortuneteller Baba's employees (except Bandages the Mummy and Grandpa Gohan)
- Ginyu - Body Change
- Guldo - Time Freeze, temporarily stop time
- Majin Buu - Change Beam / Chocolate Beam, change any object or person into sweets.
- Ebifurya - Freezing Fist, freezes the victims.