Timon's absolute confusion when Nala and Simba reunite. After they were at each other's throats. And after she tried to eat Pumbaa, who, after pleasantries, seems to have completely forgotten about it. Which only confuses Timon more!
Simba: Nala, I'd like you to meet Pumbaa. Pumbaa, Nala.
Pumbaa: Pleased to make your acquaintance.
Nala: The pleasure's all mine!
Timon: How do you do.. Whoa! Whoa. Time out.. Lemme get this straight. You know her. She knows you. But she wants to eat him. And everybody's... okay with this? DID I MISS SOMETHING?!
"Roasty toasty princess... roasty toasty princess... Hey, is it hot in here, or is that just me? Fire! Yowww!"
The Lion King 1 1/2
Funny Moments: When Timon stalls Shenzi for time by proposing. The looks on the faces of Shenzi, Banzai and Ed, and especially Pumbaa, are unforgettable.
Timon: Shenzi Marie, I know what you're thinking. We're too different. It'll never work. What will the children look like?
The way he does it is pretty insulting too - "If not now, when? If not me, who?" For believers in the Shenzi/Banzai pairing, Banzai has a pretty smug look on his face the whole time.
Timon & Pumba's MST3King, particularly their reaction to the hula.
Timon:(completely deadpan) You okay if we skip this bit?
Pumba:(completely deadpan) Yes.
The retcon regarding why the animals bowed down to the newborn Simba.
"It's either that slug I ate, or I'm having an epiphany!"
"Everything the light touches...belongs to someone else!"
"That is not where I thought you were going with that."
At one point Pumba, Simba, and Timon are shown sitting in a pool with bubbles to relax. Cue Pumba getting out of the pool and the bubbles stopping. Simba and Timon look at the pool in disgust and run out of the pool.
The part after the hula scene:
Timon's mom: "Something is different about Timon." Uncle Max: "You think?(shouts) HE'S WEARING A DRESS!"
Simba is constantly waking Timon for various reasons, and what should make a return but the infamous log:
Timon: "We're gonna get old walking across this thing."