>>24793871101 on how to spot someone who's never played gen one. I'll try naming all the glitches that come to mind without browing youtube, bulbapedia, etc.
>Missingno>Name slot glitches>Substitute suicide>Boosting too much = rolling back to 0 >Body Slam can't para normal types>Toxic Leech>Using battle moves as items>Counter can counter x-speed and full restore>Transform giving you the Cooltrainer attack>Mew glitch>100% catch glitch>Walking in the cycling road>Surfing and fishing in statues>Negative exp glitch>Using Explosion and Self Destruct without killing yourselfYou know, the worst part is that people will actually TRY to defend this shit solely because muh notalgia and because bashing Undertale is the coolest thing to do.