ActRaiser/Marahna

Boss: Plant
The plant has a simple pattern of attack, but is dangerous nonetheless. The plant itself does not move, and there is a single platform directly in front of it. In order to do damage, jump and slash at the blue flower. Periodically the plant will emit a floating spore, which will sprout tentacles but otherwise remain stationary. Also, a vine patrols the mist and reaches for the player when it is near. It's best to walk to the left to lure the vine away from the platform, then jump over it while moving back right and get a few hits in on the plant with each repetition.

Boss: Viper
This creature floats in tight circles in the center of the room, and occasionally attacks by trying to crush the player. It sometimes shoots out a magical arrow, but it always indicates when it's about to do so. Every once in a while it will call a platform with spikes down from the ceiling, which can be ridden up in order to strike with the sword. However, if ridden all the way back to the top the platform will crush the player against the spiked ceiling. The best strategy is to ignore those platforms and keep moving, and when the boss tries to crush you, turn around and get in a few hits before it rises up again.