Anyway, first to die was the second Robin, Jason Todd! Also, the longest to stay dead! This death was decided by the infamous phone in poll.
Serialized in Batman #426–429 from August to November 1988, "A Death in the Family" is considered one of the most important Batman stories for featuring the death of his sidekick Robin at the hands of his archenemy, the Joker.
Bruce Wayne ordered Dick, Jason, and Damian to leave as he helped Gotham Girl in her recovery and prepared for Bane's arrival. Entering the Batcave, he saw three dead bodies left hanging. It appears the three Robins are now dead. Of course this likely won't be the case.
Stephanie Brown was the most tragic Robin in DC Comics. She really wanted to be Robin, but at the time Batman didn't want to mentor a new sidekick. He finally relented but put Stephanie in a situation she never had a chance to succeed in. He gave her strict rules and had a zero-tolerance policy.
At the end of Batman #427, Jason was beaten by the Joker and left to die in an explosion. The inside back cover of the issue listed two 1–900 numbers that readers could call to vote for the character's death or survival.
Dick Grayson, formerly known as Robin, later known as the New Joker, is the main antagonist of Frank Miller's comic miniseries The Dark Knight Strikes Again. He was the former Robin, who turned into a murderous psychopath, because of Batman's actions to him as a child.
Nightwing's death at the hands of Damian Wayne's Robin in DC's Injustice comics adaptation is still a controversial subject among fans.
Jason Todd's notoriety precedes him. This version of Robin was so unanimously disliked that when audiences were given a chance to save him or let him die, they chose to kill him. Although the margin for this decision was very small, fans despised him due to some serious character derailment.
But Jason Todd, hands down, remains the Robin that fans have hated the longest. Didn't fans call-in to vote for Jason's death? And died he did, with a crowbar from The Joker! Jason's cockiness and haughty attitude made him hard to like, although he was a fan-favorite at the beginning being introduced in Batman #357.
Jarro grew attached to Batman and even often calls him “father”. He wanted to prove to Batman that he can be the best Robin and even convinced Batman to give him a chance. Jarro became the new Robin and was even said to be Batman's favorite Robin, admitted by Batman himself.
Damian Wayne killed Nightwing in the comic book Injustice: God Among Us, where Superman goes insane when Joker manipulates him to kill his pregnant wife, Lois Lane. This tragedy prompts Superman to “police” everyone and ensures no crime is ever committed.
In 1988, Jason Todd's Robin was Infamously Killed by the Joker. The most well-known death of a Robin occurred during the infamous storyline "A Death in the Family" by Jim Starlin and Jim Aparo. In this story, Jason Todd went looking for his birth mother, only to have her give him up to the Joker.
Dick Grayson became Nightwing after Batman fired him from his own mantle of Robin for getting shot by Joker. Grayson's Flamebird was Bette Kane. After The New Teen Titans, Nightwing teamed up with old friend Speedy in Action Comics #613-618 & #627-634 later collected in New Friends Old Enemies.
Sadly, his career as Robin ended after the Joker murdered him in Batman #428. Notable Moment: To be honest, the most notable thing Jason did as Robin was get blown up.
In Dark Knight Strikes Again, Frank Miller reimagines Dick Grayson as a Robin whose bitterness towards Batman turns him into a new terrifying Joker. In Frank Miller's The Dark Knight Strikes Again, the original Robin became a dark new Joker.
Jason Todd was a street orphan until he met Batman after he had saved him from The Joker. Jason was trained by Batman and later became the second Robin, but he was beaten and tortured by the Joker, who sent Batman a video of the event and lied by telling him that Jason was dead.
Tim Drake may be the youngest of the Batman Family but he's also the smartest and a master of deductive reasoning. Tim is a true believer in Batman's mission and is motivated by the conviction that Gotham City needs a hero rather than by personal loss.
Batman's Least Respected Robin Did What His Other Sidekicks Couldn't - IMDb. Out of all the partners who have taken on the mantle, only one Robin has helped Batman in a way the others couldn't. Stephanie Brown proved herself to be an important ally to Bruce Wayne at a tense period of time with his team.
Also, I'm assuming you mean weakest in physical strength. If we go for the main 4 Robins, Tim Drake has the least amount of physical strength, but don't be mistaken, he is still VERY strong. You mentioned Jason Todd, he is actually the Strongest Robin both as Robin and as Red Hood.
Tim Drake Is The Oldest Robin to Avoid His Dark Potential Future.
Unfortunately for Jason Todd, his time as Robin was much more difficult than Dick's tenure had been. Jason's anger issues and anti-authoritarian behavior caused constant conflict between him and Bruce.
The death of Jason Todd nearly made the Dark Knight quit. The hero couldn't help but get the same feelings after nearly watching Tim Drake die in his arms and being forced to change his costume at his sidekick's request.
Dick Grayson was the first Boy Wonder of DC Comics. Dick Grayson decides to leave the mantle of Robin and become Nightwing. This moment is the first real reason why Dick left Robin's mantle behind – he thought he needed to move on.
Killed the Joker
In Joker: Last Laugh #6, Nightwing is tricked into believing that the Joker fed Tim Drake to Killer Croc. Enraged at the (supposed) death of his surrogate brother, Nightwing beats the Joker to death.