Follow this guide to find all the 1-ups in Bio-Hazard Battle.

2nd level: After the steep incline you will start to go down. Stay below the track and you will get the first 1-up.

3rd level: After passing the inkblot guys in the jungle, stay towards the bottom. The 1-up will appear just before the incline.

4th level: After the guys that look like lips stay towards the top of the ceiling. When you start going up stay towards the back of the screen and the 1-up will appear.

5th level: At the part when the boulders are shooting up at you stay at the top and the 1up will appear just in front of you.

6th level: When you are at the 3rd stage of the plane blow it up and then pull backwards. The 1-up will appear.

7th level: When you are going through the part with the pipes and the stuff coming out of them, stay at the back, always charged. The 1up will appear at the end.

8th level: Just after the mini boss and you are crashing through the walls, stay to the top/back. The 1-up will appear.