Like Asriel, Monster Kid was a docile, unadventurous, and loving child. They are also shown to be extremely solicitous, pusillanimous, diffident, and cowardly, as they kill their adoptive mother to appease the protagonist in a vain attempt to save their own life in the Genocide Route's conclusion. Much like Flowey, they are a greedy, arrogant, egocentric, manipulative, devious, sly, and cunning planner, who is subtle if the circumstances require it. Despite this, they will also criticize the protagonist if they kill any monsters in the Ruins. Temmie has a malevolent and cruel disposition, berating the protagonist for not following their 'kill or be killed' philosophy. Whenever they drop this guise of friendliness, they often call the protagonist an 'idiot'. They often greet the protagonist by saying 'HOI!' and calls themself their 'best friend'. Much like the original version of Flowey, Temmie operates under a façade of friendliness and politeness. In this AU of Undertale, Temmie swaps roles with Flowey, the main antagonist of the original game Asriel and Monster Kid also swap places. They are the first character to meet Chara after the latter loses their way and falls into the Underground. Monster Kid, also known as Temmie the Tem, or just simply Temmie is the main antagonist of Underswap. Everyone, everything in these worthless memorys. Let's destroy everything in dis wretched world. ~ Temmie before fighting the protagonist. I'll show them all the REAL meaning of this world. It feels great tu have a soul inside meh again. And I've got the human souls! Boi! tem've been empty for so long. Without u, tem nevs could have gotten past hur.

Escape the underground asrial ending