Pokémon G/S Walkthrough - Chapter 26

Viridian City

TM 42 - Dream Eater

Talk to this guy in Viridian City to get TM 42, Dream Eater.

Trainer House

There's an excellent place in Viridian City where you can level up your Pokémon and get some cash.  Inside the building next to the PokéMart, go downstairs and talk to the lady.   Answer yes and you'll fight a trainer with the following Pokémon shown in the table below:

  

Pokémon	Level	Exp.
Meganium	50	2227
Typhlosion	50	2238
Feraligatr	50	2250
Prize: $5000

Viridian City Gym - Blue

Looks like Gary...err... Blue has taken over Giovanni's Gym Leader position after he swore he'd give up Team Rocket.  Blue uses Pokémon similar from the old versions, with references to the show as well.  Blue's Pokémon may give you more challenge than previous Gym Leaders since he uses different types.  Pidgeot - Electric move.  Alakazam - Electric move. Rhydon - Water move.  Gyarados - Electric move.  Exeggutor - Fire move.  Arcanine - Water move.  That shouldn't be all difficult. After getting the Earth Badge from Blue, head back to Pallet Town.

Blue
Pokémon	Level	Exp.
Pidgeot	56	2064
Alakazam	54	2151
Rhydon	56	2448
Gyarados	58	2659
Exeggutor	58	2634
Arcanine	58	2646
Prize: $5800