well in last laugh lex was president didnt joker pawn him anyway
i remeber in outsiders joker had captured luthor and was tourturing him
and i remeber ra's al ghoul who is one of the smartest guys out there up there with bats and luthor, he said he was missing something but that the joker had it and asked him for help joker also beat him at chess riddler who is super smart got scared cause bats said if he told anyone who he was he'd tell ra's al ghoul he used his lazurus pit
and didnt joker pawn luthor in worlds finest
he gives bats a challange all the time when nightwing first faced him he basically almost wanted to give up crime fighting so it says on mycomics
dont forget what happed in jokers last laugh, he basically took over half the world with 30 minutes prep, and infected alot of people including luthor, and doomsday. solomon grundy, WW villain circe.
this may not seem such a big feat but he put down slade when slade came after him
he has put down WW with his venom not the super venom but a lower version of it for a little while he put her down.
hush did run him out of town, hush was a genious he had everyone under his thumb, even ra's al ghoul was helping him, when the joker returned he started a war with hush resulting in hush having a pacemaker put in him with joker holding the controlls thus giving joker controll over hushes heart
spectre almost lost it trying to get into the jokers head i think he almost or did revert back to parallax
he did come to metropolis once and had prep to take down supes didnt he?
he knew how to use the philosopher stone in seconds or minutes when it took luthor months and didnt know yet
people say he's a punk but i dont know his feats are way up there he even almost killed black mask but of course black mask almost killed him too.
id like to see him take on braniac wonder what stuff the people in DC would do if he did that