You know how MissingNo. is said to be super game-breaking? Fans exaggerated it because of its status as the most well known glitch Pokemon. Yes, it duplicates the item in the sixth slot of your bag so you have 128 of those (I want to say the normal limit is 99), and yes, it corrupts the Hall of Fame. But there are glitch Pokemon that have way more damaging effects. And in terms of base stats, while MissingNo. does have a base Attack stat two points higher than Dragonite (the Pokemon with the highest base Attack stat in Gen 1), its other stats suck. Its base Defense is 0, but due to the way an individual Pokemon’s stats are calculated, no individual MissingNo. has a Defense stat of 0. Yes, Shedinja’s base HP stat is listed as 1 and it always has 1 HP, but it’s a hardcoded exception to the rule that tells stat calculations to ignore HP and always set it at 1. As for MissingNo., its pathetic base Defense is lower than Caterpie. And the rest of its stats also suck, so it can dish out serious physical damage but can’t take physical or special hits well (back in Gen 1, Special Attack and Special Defenses were one stat simply called Special, which is two stats in one that prevented Gen 1 Pokemon from being weak to special attacks but strong at dishing them out or vice versa; MissingNo.’s base HP stat also sucks), and it’s also slow.