The ending of the first game; Jim makes it to Princess What's-Her-Name, and she puckers up to grant a Smooch of Victory and the cow you sent flying up at the beginning of the game lands on her, knocking them both into a river/pit of lava. Jim mopes for a moment...then grabs her crown and happily wanders off.
The ending of the second game; And so, having defeated the nefarious COW, our hero, COW, wins back the heart of the lovely COW. In other words, Jim, the Princess and Psycrow — aka the hero, the love interest and the big bad — all turn out to be cows in disguise.
Anything involving a cow deserves special mention (particularly the second game's ending, as mentioned above).
Or anytime Jim goes into Large Ham mode. Which would be about 90% of the time.
"''Eat dirt, everyone in the vicinity!! AHAHAHAHAHHAHAHHAHAH!!"
At the beginning of "Conqueror Worm", Jim and Peter are hanging at the Terlawk Mall with The Mighty Hamstinator. However, Hamsty can't get over his habit of stuffing random things in his cheeks, leading to this line...
Jim: Hamsty! Get that cheese hostess out of your mouth! You don't know where she's been! Ishy! Ishy!
As Jim, Peter and Snot have to retrieve the suit.
Narrator: ...But how can our heroes ever hope to get past the sinister guards? (Jim, Peter and Snot calmly stroll by) Peter: Evenin', guys! Guard 1: Evenin'. (beat) Did a giant worm, a talking dog and a smiling booger just go by? Guard 2: Yep. Guard 1:(picking up the phone) Hello, DNA lab? Whatever you guys are doin' in there, CUT IT OUT!
During the fight:
Jim: I've been thinking about this whole "exact opposite" thing. Since I hate losing, you must love it! So why not give up right now? Evil Jim: Oh, don't be so literal-minded.
"Feel the awesome power of your own left fist!"
The Enchanted Snail Petting Zoo.
Jim: I think they like you, Peter. Peter: THEY'RE DEVOURING MY FLESH!! Jim: [laughing] Well, that just proves it.
At the beginning of the Christmas Episode, Jim gives Queen Slug-For-A-Butt a present.
Queen: For me? You shouldn't have. (She opens the box which blows up) You gave me that LAST YEAR!
At the start of a Running Gag, Jim and Peter are at the International House of Haggis;
Peter:(eating) This haggis stuff is great! I wonder why nobody comes here?
Jim:(deadpan) That's because haggis is the heart, lungs and liver of a sheep, boiled in its own stomach.
After replacing Jim's suit with a weak replica.
Jim: Leaping out of the way...isn't as easy as it used to be.
Professor Monkey-For-A-Head: That's because you now have the strength of an ordinary person!
(Jim tackles him)
Professor Monkey-For-A-Head: Correction...an ordinary...really big person...
Earlier, The Professor explains why he can't make a second suit;
Professor: Monkey-For-A-Head: Well, I could, but the suit's power comes from the Battery of the Gods, and I only had one. I tried to get another, but the gods turned me into a bread-maker.
Psy-Crow: Pfft! You're not a bread-maker!
Professor Monkey-For-A-Head: Oh yeah? Check it out! (Strains, a bell goes off and he pulls a loaf of bread from his coat) Actually, it's kinda handy. If I pull the monkey's tail I can make pumpernickel.
(Cut to a shot of Psy-Crow's REALLY weirded out face)