Shame about Lapras Chengaleng. I found my monster CP goes up significantly as my level rises. I use a lucky egg and evolve pidgy and rattata to earn loAds of XP. I will be trying out the gym this week and will give feedbacks.
Sorry about the strange terms. Pokemon go is quite a simple game. You wander around and catch different types of Pokemons. The CP (combat power) generally increases as you level up (I am currently at level 20). It takes a bit of skill to throw the poke balls (or great ball, or ultra balls which give higher success rates) to catch the Pokemon.
Each Pokemon you catch you earn 100 stardust and 3 candies of the Pokemon type you caught. You use both to power up that specific type of Pokemon. When you have enough candies, you can evolve the Pokemon to double its CP.
Pidgey ====> Pigeotto (12 candies) ====> Pigeot (50 candies)
I can power up my Pigeot CP 3-4 times further as my level has risen 4 times using stardust and Pidgy candies.
This game is really fun in that it forces you to wander around town in search for rare pokemons (higher CP).
Once you reach level 5, you can join one of three colour teams (red (valor), blue (mystic), yellow (instinct)) and battle for supremacy in a gym. If your Pokemon can hold a gym for 21h, you can collect 500 stardust and 10 poke coins which you can use to buy useful items and bag upgrade (increase storage capacity). Any Question