It always works if the first Pokemon in your party is at a higher level than the wild Pokemon. Any wild Pokemon whose level is higher or equal to your lead Pokemon will penetrate the Repel.
Snorlax can learn Explosion.
No it can't.
The Porygon line is the only line to have all 3 pokemon in different gens.
Incorrect. Elekid/Electabuzz/Electivire? Magby/Magmar/Magmortar?
some more;
Speaking of Repel, in RBY, yu could use a repel even if one was still in effect. They've changed this since (haven't tried it in GSC).
Aipom is the only Pokemon to learn Double Hit by level up that doesn't have any double features to use it with (Doduo, Girafarig, and Weezing have 2 heads, Mamoswine has two large tusks, Scyther has 2 scythes, Scizor has 2 claws, Ambipom has 2 tails, and Kangaskahn has itself and its baby).
Wailord is the biggest Pokemon, but by no means the heaviest.
Normal wild Pokemon battle music plays when Cresselia is encountered. Mesprit, on the other hand, sports the legendary trio battle music.
Roserade learns Weather Ball.
Dunsparce and Qwilfish are among the most ignored/easily forgotten Pokemon.
Qwilfish is commonly misspelled.
Persian's shiny form bears little visual difference from its normal form.
'M has a slightly more sinister version of Zapdos's cry.
Skarmory and Steelix's D/P sprites are almost exactly like their R/S/E/FR/LG sprites.
Missingno. could clone key items. normally a bad thing, but this includes the fossils. Over a hundred Aerodactyl/Omanyte/Kabuto!
Fossils are no longer key items. They can be held by Pokemon and even traded! They sell for about 500 pokedollars.
Kingdra is the ONLY fully evolved, non legendary Dragon type that doesn't have a x4 Ice weakness. Or ANY Ice weakness, for that matter.
There is no fully evolved pure Dragon type.
Only 4 pure dragon types exist; Dratini, Dragonair, Bagon, and Shelgon. Not counting Arceus w/ Draco Plate, of course.
The anime got it wrong in Ash's battle w/ Sabrina thing. In RBY, Ghost attacks did NOT affect Psychic Pokemon, and all 1st gen ghosts were part poison, making them WEAK to Psychic.