thanks for the tips m8
just a question, does stacking razz berry adds up to the catch rate as well?
what is the max?

Free lucky egg from level 9, 10, 15 and 2 from lvl 20. So far I've only used 1. Took me 5 days to catch all the Pidgeys/Rattata/Weedles/Caterpies for approx 73 evolves. In the 5 days I managed to collect 125k XP. After lucky egg total is 198k. So hopefully next week can reach lvl 21 and a half.

I've done about 60. Roughly 3 evolutions in a minute. Theorectically can do about 90 but I estimate 70-80 is more likely. There are 3 things I know that can influence how many you get to evolve in the 30 mins:
1. Whether you have seen the evolutions before. If you don't have the evolutions in your pokedex, then you will also get the pokedex entry animation when you evolve it. That will take up some time though. However, that's nicely compensated since you get the 500XP from seeing a new pokemon which at double becomes 1000XP.
2. How you order your list. If your list is haphazard and not ordered properly, you can end up wasting time checking to see which pokemon can evolve and looking for them. I recommend ordering by #Number and transferring all unneeded pokemon.
3. How fast your device is. I've read that force closing the app and restarting it can take about 8 seconds which is faster than waiting for the animation to finish. Haven't tested it yet but planning to do so soon.

when mass evolve pidgeys, even if it's CP is 10, will still evolve?
is it advisable to catch enough magikarp before mass evolve (to level up) since it will be harder to catch pokemons when level is high?

what is the factor that determine/affect the level of pokemon found? the player level? or the highest CP pokemon you having? or by location?

Yup. Using xiaomi note 2. Not only slow but in the last 2-3 mins always hang. Like cannot cope lol

Damn it, wasted 1 lucky eggs.

After update to the new patch with buddy systems, I just did a mass evolve with the on/off apps tricks.

Realized that it's very unstable. Sometimes after launch app, at the Niantoc Page, the apps would auto close down. Made me have to launch the app again. It happen a lot of times and wasted my times. I think the apps crash got 3-4 crash continually each times it happen, repeating on several interval. Don't know it's apps unstable or Niantoc counter measurement to the on/off trick

End up with the on/off method I only managed to get 93 evolves. Damn it.