Can multiple players of the same team fight their own team gym?

Question

I have 3 questions related to this:

• Can multiple players of the same team fight their own team gym in order to raise its prestige?
• If you have any experience with this, then can you also include the amount of Prestige you gained for your gym and the CP of your attacking Pokemon versus the defending Pokemon in the gym.
• What would you recommend, fighting your own team gym alone to raise it's Prestige or fight with a group (if it's possible)?

Before someone marks this as duplicate, I want to mention the question was asked as part of this one, but not answered: Battling at a gym simultaneously with other players

Answer 1

Can multiple players of the same team fight their own team gym in order to raise its prestige?

Yes, however it is not like when multiple players team up to take down a gym. The training can be done simultaneously but in separate battles. Each person's training has no effect on anyone else. As if the training was being done one after the other instead of at the same time.

If you have any experience with this, then can you also include the amount of Prestige you gained for your gym and the CP of your attacking Pokemon versus the defending Pokemon in the gym.

As is outline in this answer; you get 500 prestige for defeating a defending Pokemon with equal CP values, 100 prestige for defeating it with a double or more Pokemon and 1000 prestige for defeating it with a Pokemon half the CP or less of the defending Pokemon. For CP values between half or double it will scale somewhere between those values.

What would you recommend, fighting your own team gym alone to raise it's Prestige or fight with a group (if it's possible)?

It's exactly the same either way for gyms of I think level 5 or less, but above that it becomes better to do it alone. The reason for this is that with more people helping you raise the prestige, the more levels you need to increase the gym by in order to place everyone's Pokemon in the gym. For example with two people you gain prestige twice as fast but need to level it up twice us much. If a gym was level 2 and needs 2k more prestige to the next level, you will need another 2k (after adding a Pokemon) in order to place a second Pokemon in the gym. But at higher levels this will change to be considerably more prestige so it is easier to only raise it by one level instead of multiple.

That being said, higher level gyms are harder for the enemy to take down and thus can be worth the additional effort.

Answer 2

Yes you can have multiple people fight your own team's gym just like having multiple people fight an opposing team's gym and it is always better to fight gyms in groups regardless if they are your own but it is slightly different against your own team.

Prestige gained in groups is simply the sum of the individual battles since it is not possible to have two pokemon fighting the same monster while you are against your own team. The reason why you still want to train your gyms in groups is that one person can put a high CP but weak stated pokemon such as a rattata and grind prestige by beating the rattata with a lower CP but higher stated pokemon because you gain significantly more prestige if the attacking pokemon CP is lower than the defending pokemon CP. Placing your pokemon on a gym in a specific order is also important since the lowest CP pokemon will always show up first however you want to go up against a 900 CP raticate over a 800 CP vaproeon when grinding prestige.

I've gained over 500 prestige from beating only one pokemon because my CP was lower than theirs. While I only gained 337 prestige from beating all three pokemon at the gym with a higher CP one.

Sources: Personal Experience