As Alice arrives in Underland, the Tweedle Boys, alongside the Dormouse, Nivins McTwisp, and the Dodo approach her where they do not recognize Alice during her arrival at Underland, to which they take her to Absolem. After talking with Absolem, Tweedledee and Tweedledum stare upon the Oraculum, to which Absolem tells the group to show the group Frabjous Day, to which when the Tweedles read, they explain that this is the time where Alice is to slay the Jabberwocky. Later while strolling across the garden, the Bandersnatch, alongside the Armored Cards and the Jub Jub Bird chase after Alice's friends to which the Jub Jub Bird captures the Tweedles to take them to the Red Queen's castle as the Tweedles are discussing which direction to take upon looking at a nearby sign.
Furthermore, the Tweedles work for the Red Queen and when Alice arrives, the two approach her to which Alice secretly tells them not to say what the Red Queen had done to both of them to which the Red Queen sends them to leave the throne. After talking with the Mad Hatter, Alice encounters Tweedledee and Tweedledum in the corridor to which she asks them where the the White Rabbit is at to which Alice follows the Tweedles across the corridor in the Red Queen's castle and approach the Dormouse and the White Rabbit in a plan to rescue the Hatter. Later when the Cheshire Cat rescues the Hatter from execution, the Hatter tells all the people working for the Red Queen that she has betrayed all the people working for her as slaves to which they all listen to what the Hatter says, causing the Tweedles alongside the other servants to celebrate their freedom, much to the Red Queen's fury as she release the Jub Jub Bird to attack.
Later, the Tweedles arrives at the White Queen's castle to which the Tweedles look at a picture of Alice preparing to slay the Jabberwocky. The Tweedles later participate during battle against the Red Queen fighting against the Armored Cards to which the battle ends when Alice slays the Jabberwocky, causing the Armored Cards to arrest the Red Queen and the Knave of Hearts for her lies and betrayal. Later, the Tweedles see Alice preparing to leave Underland as a farewell.