Boss Fights

Boss fights are battles againest strong foes

Ease 1/Ease 1 Deluxe
This game has 2 bosses but in the deluxe version its 9 or 10 bosses

Ease 2
This game is built around bosses and if you want a full experience you should not skip the boss fights but you HAVE to fight the final boss

Ease 3
This game has 4 bosses, And they kind of get repetitive

Ease RPG
Only 1 boss is seen and it's Ifei instead of dream ease being the final boss

Ease 4
The bosses in this game are okay, The Lilo Boss fights were easy but if you didn't know the strategy it could be the second or possibly first hardest boss in the game!

Ease 5
Boss Fights are not present in this 3D platformer however on stage 8 you must deactive ifei's machine and escape which is kind of like a boss

Ease 6
The boss fight in this game is horrible, Once you click the button you beat the boss

Ease 8
Polo Ease serves as the final boss and is pretty tough

Ease 10
The final battle is dream ease and the three boss fights before is Sand ease, Brother ease, Wet Ease

Ease 11
Arguably one of the best ease games with an amazing story and platforming and some puzzle mixed in

The boss fights in this game include The creator (Level 1) The Creator Giant (Level 3) Ifei (Level 4) Level 6 (The Creator FINAL) Level 8 (Carjt)

Ease 12
The only boss in this game is twin lion

Ease 14
The confirmed bosses are a Turtle (Hilly Plains), A Ghost (Haunted Caves), Swordsman Ifei (Castle Chaos) and of course The Creator as the final boss. There are 2 other unconfirmed bosses.

Theory
One of the bosses could be The Creator's second-in-command Hookshot in the evil lair level