Minis are small purple jellies who have no spikes. They are quite dangerous if you ignore them! From my research, I learned that they are actually 2D! They are neutral and will attack you only if you get very close to them! They have a polyp form too (jelly turrets) and those are tier 1 due to the difficulty of tier 2 ones in the boss battle. they have two attacks: The normal shooting spikes and hurling minis. Minis also heal the Jelly king! Like lichens, they'll merge into the Jelly king but unlike lichens, he won't get any bigger!
Tactics.
1. Always kill minis first.
2. In boss battle starve the jelly king by having one member kill the turrets. (the turrets respawn each stage)
3. In boss battle poison the Jelly king so he can't heal and attack him.
What not to do.
1. Run away from minis.
2. Ignore minis.
3. Walk up to the minis and say hi.
Thank you for reading. I hope this thread was helpful and good luck in the royal jelly palace.
There are many ways to beat the Royal Jelly. I always ignore the minis, counter to your advice. I just try to damage/status RJ as much as possible. In particular, poison prevents him from healing, which removes half of the mini problem. Another tactic is to use a large attack, such as Gran Faust swings. Then you hit RJ while also clearing minis around you.