In generation II and their remakes, Red is the final boss in the game. He has a very powerful team of Pokémon in the late 70s and 80s, as well as very good type coverage. In the remakes, though, his Espeon is replaced with a Lapras, and all his Pokémon are in the 80s. His Pikachu also has Ash's Pikachu's generation IV moveset.
Did you battle Red in the original games and their remakes? Were you able to beat him on the first try? It honestly took me quite a long time to beat him. :x Red is extremely difficult if you're not prepared.
Tbh, I found both Gen 2 and Gen 4 versions of Red quite disappointing..
For Gen 2, some of their movesets were lame (why mud slap on an Espeon, and whirlpool on a Blastoise??), and Gen 4 had filled all his pokemon's movesets (bar Venusaur) with just attacking moves... no stat-improving moves or support moves (at least Espeon had reflect) etc.. and a Snorlax not having rest or curse, and half its attacks being special is just asking to be defeated..
I also definitely wasn't a fan on Gen 4 having Red's Espeon replaced by Lapras.. at least with Espeon, it didn't monopolize the type weaknesses Red's team had.. but with Lapras, half his team can now be taken out much quickly by a good thunderbolt.
I could beat Red with just lv 60+ pokemon, even with the upgraded level HG/SS had with Red.
I battled him for the first time in Silver version, and lost to him since I didn't know who he was and battled him by accident thinking he was just a common NPC. I didn't save before the battle, so I had to start over from the Pokemon Center.