This is how I beat the first boss: I grabbed the glue glob and then the boss looked down and then it looked up. Then I did a ground pound on it. Then it's head got stuck onto the floor and there was a lot of coins. Then I sucked them up. Then I picked it up. Then I took it and I jumped and then I smashed it into the ground. Then I keeped on doing that. And then he was defeated.
Here's the next boss: It was a giant two-headed dragon-fish. One of its heads spitted out glue globs and the other sucked it up and then spitted them out. It was trying to make me fall onto the glue globs so that I would get stuck inside of the fish. And then it would spit me out really hard on the ground. And then I beat up one of them. And then it was all dizzy but I couldn't pick it up because the other one wasn't. Then the other one spitted fire and then it got onto the other one and it hurt both of them and they lost a life. And then I keeped on doing that. But then they had a new attack where they spitted out little balls...they were very pointy. It was trying to hit me. But then I defeated it by doing the same thing.
Here's the next boss: It was this big cow. It tried to stomp on the ground and it stomped right next to me so it would hurt me 'cause it stomps so big. Then I punched it a couple of times. It got mad so then it charged right at me, but I got out of the way. And then he fell into the lava because I jumped and then I ground pounded the floor and the lava came out of the floor because it wasn't fully covered. But I was safe because I was on that floor. And then it had a new attack where it jumped into the air and then got into a ball into the air and spinned around. Then it went right at me. I was lucky that I jumped. Then I did it again and again until it died.
Here's the next boss: I had no trouble at all. Except for one time with this guy. He tried jumping onto both of the ship parts. Then I punched and then he got all dizzy. So I picked him up, then I spinned around and then I let go of him, threw him onto the ground. It took a couple of lifes down. Then he could do a super move. So then I grabbed a barrel and I threw it at him two times. And then I did the same thing.
Here's the last boss: It was this big black jewel with one eyeball and tentacles. It's attack was to shoot lasers down onto the ground and make fire and trap me in it. And I had to open all the spritelings out of the jewels and then they jumped up and punched it. When I was trapped, the jumped up into the air and then dropped onto the ground to make a big, big earthquake. And then some of the fire went away. And then it could also use another attack where it throws fireballs and they follow me and go around. And then when I got all the spritelings open it was dizzy so I grabbed it and then I turned around a whole bunch of times and threw it onto the ground again. Then it was defeated.
Now Wario's castle was completed, thanks to the spritelings. Then I beat the game. And that's all.
There was other bosses, but you can just figure out how to beat them yourself. That's all.