'''[[Administrivia/SpoilersOff Spoilers are off as per wiki policy.]] [[Administrivia/YouHaveBeenWarned Read at your own risk!]]'''
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* '''[[BadassAdorable The mouse in general]]''', {{Expy}} to [[WesternAnimation/TomAndJerry Jerry Mouse]] or not.
** [[NoodleIncident He once locked the house's previous owner in a trunk in the attic]], [[BrickJoke then did the same to Caesar during the latter hunting him down]].
** With the Smuntz brothers:
*** 1. He'd foiled Ernie's floor of mousetraps by avoiding them with ease and a noticeable clear path, followed by climbing up to the shelf, then swinging onto the light switch to the next shelf[[labelnote:*]]([[SincerityMode which Ernie was amazed by]])[[/labelnote]], then reaching the top of the fridge, and dropping down a cherry; resulting into [[ThisIsGonnaSuck the conclusion where the traps go off]] [[HoistByHisOwnPetard and the brothers are snagged in 'em]].
*** 2. This is subsequently followed by Ernie chasing him with a vacuum cleaner and him and retreating to a hole. All was lost for him until he noticed a tag attached to a pipe that said "sewage line", giving him the epiphany of placing the pipe inside the vacuum's pipe. Not long later, the vacuum's innards expand with the sewage inside it and blows up inside.
*** 3. After sending Caesar in to get him, Ernie catches him while the mouse made himself a sandwich. After Lars tries to smush him with a frying pan but misses, Ernie goes after him into the chimney, but gets stuck before he could go any further. As Lars goes to get a flashlight, the mouse takes off a clamp to the gas and places a matchbox next to Lars after the flashlight wasn't working; which results in the gas making a tremendous pyrotechnic explosion sending Lars flying into the kitchen and Ernie skyhigh and into the lake.
*** 4. The following escapade has [[SanitySlippage Ernie]] getting a shotgun from the wall from the and chases him down the house until he aims into the hole he retreats to which contains Casaer's flea bomb; blowing up the floor in the process and having the brothers plummet into it.
---->'''Ernie:''' God, I hate that mouse.
* As Lars has had enough with Ernie's selfish pursuits, he throws an orange at him, but misses and inadvertently knocks the mouse unconscious.
-->'''Ernie:''' You killed 'im! ''(laughs in amazement)''\\
'''Lars:''' I didn't even know he was there.\\
'''Ernie:''' [[CouldHaveAvoidedThisPlot Just think of all the trouble we could have saved ourselves if we just threw fruit at him in the first place.]]
** When they begrudgingly find they can't finish it off, they go for the CoolAndUnusualPunishment of mailing it to Fidel Castro. They may not be able to kill it, but they'll damn well get some payback on the devious little rodent.
-->'''Ernie:''' Aw, I forgot to put holes in the box.
** And then doubles back when the mouse ''still'' finds its way back to the house.
* Even though it ended up being all for nothing in the end, Ernie and Lars actually do manage to completely restore and renovate the house for the auction, even repairing the extensive damage done to it during their battles with the mouse and implied to be all on their own and in only a few days time at that.