Cwisis on Infinite Earths!
The Justice League and the Looney Tunes split up into three teams to take out the Toyman's machines:
Superman, Flash, Green Arrow, Elmer Fudd, Foghorn Leghorn and Pepé Le Pew encounter a tank with a cannon powerful enough to incapacitate Superman. Flash warns the Looney Tunes to stay back, but Foghorn wants to help. After hearing Fudd and Pepé argue about Pepé's smell, he comes up with "an idea so good, I wish I could steal it from myself!" They get Green Arrow to shoot an arrow Pepé is clinging onto into the tank, causing the goons inside to rapidly evacuate to escape the cartoon skunk's stench.
Batman, Green Lantern, Plastic Man, Bugs Bunny, Speedy Gonzales and Taz face a giant toy soldier that knocks Green Lantern unconscious and causes him to fall. Speedy quickly stretches Plastic Man into a safety net to rescue the Emerald Gladiator while Bugs convinces Taz to eat one of the robot's feet, causing the whole thing to fall over.
Wonder Woman, Aquaman, Martian Manhunter, Porky Pig, Yosemite Sam, Sylvester and Tweety run into a robotic dragon that easily bests Martian Manhunter with its fiery breath and grabs Wonder Woman and Aquaman. Tweety angrily flies at the dragon and finds himself inside it with the piloting goons. They ignore Tweety, believing him to be harmless, but Tweety starts pressing every button and pulling every switch that he can find, causing the dragon to shake itself to bits.
Meanwhile, Mr. Mxyzptlk tricks the Do-do into trusting him again and proceeds to tie him up a second time before embarking on the "merge the two universes forever" plan himself.
Daffy Duck, still believing he is Batman, finds the Toyman. The criminal easily convinces him to join his organization with a job offer (and a very large salary), but just as they shake on it they find themselves transported through dimensions (their hands get stuck together thanks to some superglue Daffy got himself covered in earlier). The furious Toyman prepares to shoot Daffy, but is put off the idea by the revelation that all the other Looney Tunes and the DC superheroes are all there too. After the Toyman surrenders and is arrested, Bugs and Superman start wondering how they can get everyone home before it is revealed they are all at Mxyzptlk's base. He gleefully threatens to merge the Looney Tunes' world and the DC Universe into one forever, much to the terror of the Looney Tunes (who all note how many problems the DC Universe has).
While Superman and Batman waste time wondering what to do, Bugs takes action. He pretends to congratulate Mxyzptlk, convincing him to brag of his victory by posting it on the popular website "www.kltpzyxm.com"; when Mxyzptlk says it aloud he is transported back to the Fifth Dimension. Freed, the Do-do resets the machine to separate the two universes forever, announcing he intends to stay to run amok in the DC Universe and sending the Looney Tunes home because "I don't need the competition". Superman and Bugs Bunny shake hands as they leave, the Man of Steel commenting that the Looney Tunes are real superheroes.
Back at the Daily Planet, Clark Kent reads a Looney Tunes comic and happily notes that Bugs and the others are back home before being sent on another assignment by Perry White. Perry notices that Kent has left a mysterious box on his desk and opens it out of curiosity, revealing Michigan J. Frog. Perry dreams of fame and fortune with the frog while, back in the Looney Tunes' world, Bugs reads the scene in a Superman comic and glumly foretells the disappointment that awaits Perry. Daffy wonders aloud whether people in the DC Universe would believe what has happened if they knew the truth, to which Bugs replies "Let's put it this way - they'd believe that before they'll believe what Perry White's gonna try and tell them!" as Porky signs off with his classic "Th-th-th-that's all, folks!"
