This is gonna be a few quick tips to help you get faster times in co-op speedrun.

Since it feels like the seond player is useless at first, I'm gonna show you how exactlly the second player can be used effectively and how you can benefit from a co-op treammate.

1. The most obvious way is to kill the enemies while the 1st player goes straight to the next door

2. Also pretty obvious: Fight together

3. In 11-2 there is a room with a lever which spawns green walls to block your way. The 2nd player can hit the lever with the 1st player already being on the other side so that you skip the whole section.

4. In some levels there laser beams which by contact will hit you with a lightning. If the second player runs into them, the lighning will kill him, but also all the enemies in range of the lightning

5. Healing the 1st player by pressing triangle

6. Giving the 1st player extra relics to do certain skips

7. Healing on Wood-Knack Stage for skips or if no wood is left for a furnce

8. Using sunstone energy for a mini shockwave. The second player uses only a quarter of sunstone energy for a supermove and can also do a double supermove with less sunstone energy

Bonus: In Coliseum Attack you get extra points for defeating enemies with sunstone energy. The second player can kill way more enemies with sunstone energy than the first player due to lower energy cost.