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Not a problem! For those under Level 50, I just ask that they stay under Lv. 50. I think Heatran is already Lv. 50, I would like it if he stayed that way but if you can't do that it's no problem!
I think I found it:
94000130FFF30000
B211188000000000
20001128000000FD
2000112A00000018
D200000000000000
Press start+select while inside the house at route 25 then exit