Trapper Keeper: Part 1 - S3-E11
Character mistake: When Jesse is explaining Crystal Beast Amethyst Cat's ability to Trapper, he says "When I give up half my life points, you'll see what I mean." Amethyst Cat's ability allows it to attack an opponent directly by giving up half of its attack points, so Jesse was incorrect in saying he would be giving up half his life points. (00:10:30)
Character mistake: Artie says he'll recite pi to 100 decimal places. After the first few numbers, it skips to him finishing up by saying "46375." The last 5 digits would be "70679." In fact, the sequence "46375" doesn't occur until the 95,517th position.
Character mistake: Professor Saotome checks the status of the Getter Robot when his son falls unconscious. The HUD output is written in awkward EngRish, from the first line of the status report, called; "Monitor the state of affairs", to smaller details like the article randomly used for certain lines ("a control device, a correspondent"). The biggest flub though is that the name of his son is "Tatsuhito", in proper romanization, but here appears as "Tatuto." (00:05:20)