Hey I would suggest looking online for coin hacks to the game. Get a bunch of silver coins then buy as many gacha tickets as you can. Go ham on that machine. I've gotten a bunch this way but it takes a while. My suggestion is keep trying the same present box until you see one. Then you try the next one over basically cycling through them every time one appears. I've gotten like 7 different ones this way 3 of them in a row with this method too so that's my auggeation.