How do you get in the cave on Astro Knights Island?

Answer 1

There are no caves on Astro Knights island.

There is the Volcano on the fire Planet. Jump from the 5th to the 6th platforms when both geysers are moving downward.

There is also Mordred's secret underground laboratory. To enter it :

1. Get the gold coin from the fountain.
2. Go to the Mordred Museum and get the library slip.
3. Go to the castle library and down into the dungeon.
4. Get the cheese and throw the switch.
5. Go to the Princess's Maid's room and get the mouse and Secret Message.
6. Go to the mill and get the password Cosmic Symbols from the loft girl.
7. Go to the fountain again, open the base (3 symbols and the Sun). Get the key to Mordred's lab.
8. Go to the field's hay bales and push them left and apart.
9. Open the lock on the secret underground lab