Only one girl - Lisa - can buy the best suit in the game, but you can give it as a gift to the other girls. Start a new game with Lisa, and pick a teammate. Only send gifts to that girl. Send her less-expensive suits at first, and work your way up slowly to the Venus, or else she'll throw it away if you give it too soon. Give one suit in each price bracket, and try to give the ones that are that girl's favorite color, though they all do accept gifts of a similar color. As an example, Lisa's favorite color is stated as Crimson Red, but she's equally happy with Hot Pink. Neon Orange turns her off.

It's important to keep your teammate happy or she won't accept the more expensive suits, so toss in the smaller items (hats, shoes, volleyballs, foods, etc) to keep their levels up, even if you're on a winning streak...

You might have to play through the game with Lisa a couple or more times to get enough money to buy all the gifts, but only send gifts to that one girl until you can give her the Venus. Even if she throws it away, continue sending her smaller gifts until the end of the game.

Now start a new game and pick the girl you were just sending gifts to as Lisa, and pick Lisa as your partner. Whatever Lisa (you) sent that was thrown away in the previous game will be re-sent by Lisa (computer), and now you can manually choose to accept those gifts, including the Venus and other suits.

Do the same thing with all the other girls. The computer will send the other girls onto the courts wearing the Venus, but it might be a good idea to play at least one game with each girl to delete excess suits from their inventory, because the computer sends suits out to the other girls as well. Sadly, you can't delete all the suits and only leave them with the Venus, but you can certainly make their choices limited.

Another tip: Helena and Christie are both pains in the butt for this trick! You really have to shmooze these two because they are so fickle, and the computer doesn't help by not rotating the inventory to keep a plentiful stock of the colors you need (when trying to get Lisa to send Christie (me) the Venus, all I had for inventory was dark purple suits (Ayane), and Lisa split quickly because I couldn't send her anything she liked).

Helena is just too Goth for her own good - lose a few games and she scrams, and it takes 4 days to get her back if she even comes out in the day. She's also slow about sending good gifts even if you're winning with perfect games (hats, shoes, cheap suits, etc).