In rum punch, when you acquire an ally, the scenario instructs you to form an ally pile with any acquired allies found in locations.
When you encounter the villain, you may place allies from said pile into your hand to add 1 (per ally) to add check to defeat villain.
At end of scenario, the reward is the allies in the pile.
In my examples, I am using Lem whose hand size is 5.
Q1) Lem, whose hand is already at 5 when villain is revealed, places 2 allies into hand for +2 check (Diplomacy/Charisma I believe), raising his hand to 7. I assume this is temporary for this turn?
Q2) Whether villain is defeated or not, if you didn't lose (recharge/discard) any of your original 5 cards, what happens to the allies placed in your hand? Do they go back to the ally pile after this turn for your next hero to draw from when he/she encounters the villain (if moved to another location)?
Q3) If Lem had discarded/recharged a card from his original 5 (ex: missle), does he then keep 1 of these allies to ensure his hand is now 5 and return the other back to the pile? If he were to do this, then I can imagine that these allies may be lost during regular scenario gameplay, and if you did indeed win the scenario, there is a possibility that all the allies you acquired for your ally pile may already be exhausted. Is it possible to have acquired allies throughout the locations, only to not have any left (ally pile is empty)as a reward for beating Rum Punch?
Q1) Lem, whose hand is already at 5 when villain is revealed, places 2 allies into hand for +2 check (Diplomacy/Charisma I believe), raising his hand to 7. I assume this is temporary for this turn?
You are allowed to exceed your hand size at any time, except when you reset your hand. So yes, Lem could have any number of cards in his hand during his turn.
Q2) Whether villain is defeated or not, if you didn't lose (recharge/discard) any of your original 5 cards, what happens to the allies placed in your hand? Do they go back to the ally pile after this turn for your next hero to draw from when he/she encounters the villain (if moved to another location)?
As I recall, if you want to aid your check against the villain, you do something with the allies (is it just reveal?). Nevertheless, at the end of your turn, any allies still in your hand are treated like any other card in your hand -- you keep cards up to your hand size and discard the rest (into your discard pile).
Q3) ... if you did indeed win the scenario, there is a possibility that all the allies you acquired for your ally pile may already be exhausted. Is it possible to have acquired allies throughout the locations, only to not have any left (ally pile is empty)as a reward for beating Rum Punch?
This is typical, as you probably used the allies against the villain. This complaint was lodged in this thread.