For all those who want to resurrect their pokemon, but do not have, or do not want to use a revitalizer, there is a very simple method to get your friend back in shape: just level them up, as the level up increases the HP maximum of 2 your pokemon, your pokemon will come back to life with exactly 2 HP.
Other Pokémon GO guides:
Pokémon GO: Basics Guide
Pokémon GO: How Eevee evolves
Pokémon GO: How to level up quickly
Pokémon GO: Resurrect a Pokémon without revitalizing
Pokémon GO Server Status Live
Pokémon GO: How to save battery and traffic
Pokémon GO: Everything you need to know about stardust
Pokémon GO: How to get free coins
Pokémon GO: Guide to weaknesses and strengths
Pokémon GO: Get Pikachu right away
Pokémon GO: List of known bugs
Pokémon GO: How to fix Pokéball freeze on iPhone