The 2017 International Challenge April Online Competition offers a way for Pokémon Sun and Moon players to unlock the Mega Stones needed to make Sceptile, Blaziken and Swampert Mega Evolve in battle. The Pokémon Company has confirmed that all qualified participants who take part in at least three battles as part of the upcoming Online Competition will earn Sceptilite, Blazikenite and Swampertite. Registration for the 2017 International Challenge April is currently open until April 27 at 23:59 UTC. Meanwhile, the actual competition is scheduled to go from Friday, April 28, at 00:00 UTC, until Sunday, April 30, 2017, at 23:59 UTC.
All 2017 International Challenge April can receive Sceptilite, Blazikenite and Swampertite Mega Stones in Pokémon Sun and Moon
Pokémon Blog 
When can I redeem the Mega Stones from April 2017 International Challenge. I would like to know. Thanks in advance.
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We’ll post about it as soon as we hear word – it should be fairly soon 🙂
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