The Mob Psycho 100 anime series ended its six-year run on Wednesday, December 21, 2022, with the release of season 3, episode 12.
However, Reigen ultimately got to Mob in the final episode of Mob Psycho 100 III, revealing that he had no powers for the first time. After that, Mob tried to admit his feelings to Tsubomi-chan, but was rejected.
The episode then cut to Mob’s senior year, where his entire gang was seen celebrating Reigen’s birthday.
Mob Psycho 100 Season 3 Episode 12 Ending Explained.

Mob’s determination wears off in the season finale as his true, unrepressed nature is revealed. All the fight shown in the previous episodes, in addition to the damage it caused, was a result of a Mob war inside himself. He sought to destroy his psychic side, but his psychic side is not all the time wrong.
Indeed, Mob claims that his psychic side is the part of him that loves Tsugumi. However, the Mob only learns to embrace his qualities and traits once Reigen reveals his lies and personality.
This is a fantastic exchange between mentor and student. Throughout the series, Reigen significantly affected Mob, but Reigen all the time prioritized his own goals.
Reigen’s character development was shown as the story progressed. Learn to care about Mob and its growth. Despite the deception, Mob considers Reigen his mentor and, more importantly, a close friend.
Tsugumi Rejects the Mob.

Tsugumi quickly rejects Mob despite the hazards of the weather, intense fights, and even heart-to-heart bro chats. After being rejected, he was also spotted talking to Tsubomi-chan, showing his ease with her now.
After that, Mob, his brother, and their friends went to the Spirits Office and such a Consultation to surprise Reigen on his birthday. Instead of backing down, Mob returns to Reagan and sheds tears of unhappiness – a normal reaction to such a situation.
These tears show Mob’s emotional state, where he no longer hides his actual nature. Finally, Reagan puts a hand on his shoulder, assuring him that everything will be alright.
The story then moves on, and Mob seems more confident than ever. Without a doubt, he’s still the same person. However, he unexpectedly puts himself out there, socializing, leading, and even following Tsugumi. Nothing appears to be strange.
Conclusion

There was absolutely no other way for this to end, and the way it was done was nearly perfect. It was impossible to create a better finale for such a delightfully strange show as anything less than perfection wouldn’t suffice.
So what makes something extraordinary in a show that has all the time been one to challenge anime conventions and forge its own path? First, by including the final battle between the two central characters! Not only that, but it was also the perfect thing that ever happened on the show.