Season 8|Episode 10 Big Man on Hippocampus
Season 17 Episode 20
In the last episode of Season 10, Lex Luthor lost his memory as a result of Tess Mercer touching him with neurotoxin which was poison that resulted in Lex losing all of his memories prior to Tess putting the neurotoxin on his left cheek.
in the episode ike's wee wee
There are no published studies regarding betta fish memory at this point in time
yes
Pikachu loses its memory in the episode titled "A Scare To Remember."
Season 17 Episode 20
Episode 37. Although there are rumors of a 38th episode.
Series 4, episode 13: Journey's End.
I saw it in the last tournament of the manga.
Kaito loses his memory in "Magic Kaito 1412," specifically in Episode 17 titled "The Memory Thief." In this episode, he encounters a magical artifact that causes him to forget his identity and past. The storyline explores the challenges he faces as he tries to regain his memories while dealing with the consequences of his lost identity.
No
You can lose your memory from becoming old or from losing to much white brain cells.
Retest when the whole Russo family (accept for mom of course) will lose their powers in less the whole family retakes the test.
episode 173
Saito meets Hei in episode 26 in the first season. But in the end, i think Hei makes him lose his memory which makes him forget.
Uhm...no