I have a reason to suspect you cheated... Magma storm has 70% accuracy.
Using it three times in a row sorely decreasing the probobility.
1st time: 70% Chance
2nd time: 35% Chance
3rd time: 17.25% Chance
Heatran cannot outspeed a jolly jirachi with 31 IV's in speed, and evd 252 in speed. But heatran did outspeed jirachi, so that heatran probobly had a choice scarf. No way he had a wide lens.
Now with this, i can probobly say, he got lucky.
But in this case, your blissy uses sing twice.
Sing has a 55% chance of hitting using it twice consecutively causes the probobility to go down.
1st time: 55% chance
2nd time: 27.5% chance
Blissy used a leftovers so widenlens again is not possible.
I dont know if you just got lucky or what?
Also, meteor mash with metagross crit twice, and both times increased attack.
Wifi is also notebly slow.
I can deduce that you are using an action replay.