Hello Pro Moderators,

 

I was doing heatran quest today. I bought a masterball from a player named ''Priyankaa''. Then when i went to catch the pokemon (while battling againts heatran) i noticed i have no masterball in my bag and i relogged. after that i thought it was a bug. I bought another masterball and went to catch heatran again and i didn't see heatran there in second time. Please help me about it. All i want to do that is catch the heatran.

The Buck NPC takes your master balls and rare candies upon starting the quest. I guess you defeated the level 99 Heatran in the first place? After that you would have needed to talk to Buck to get your masterball back.

Since you were unsuccesfull in catching Heatran on the quest you will have another chance to catch it by beating the Nikola boss.