I think Brock and Misty should be unchanged being the first two gym leaders. Also, no Pikachu for Red?
I also would've preferred being able to catch/battle Pokemon outside of Kanto.
Good idea though.
Thanks! Well, Misty does have a slight level advantage over Brock in the originals and FireRed/LeafGreen if I recall. Not much, but the player would definitely feel an increase in difficulty.
I thought that Pikachu would appear next to Red when you encounter him, but doesn't participate in the battle because let's be honest, defeating it would be too easy, don't you think? An Earthquake could do with him in a matter of seconds, even if it's his highest-leveled Pokémon.
To preserve the feel of nostalgia from the first ones, I decided to make only Kanto Pokémon catchable during the first run; Pokémon from other regions start appearing in the Sevii Islands and in new side quests that appear after beating the Elite Four, as well as on other standard routes. However, Pokémon introduced after Gen I that are related to the Pokémon from that gen are part of the Regional Pokédex. By this, I mean that Pichu, Crobat, Espeon, Tyrogue, Magmortar, Electivire and others are obtainable before beating the Elite Four.