The Japanese Official Pokémon twitter account issued a challenge to have the Japanese hashtag #ボールガイチャレンジ (Ball Guy Challenge) added into various tweets.
These are the gifts given out, when the hashtag has been tweeted multiple times:
2,000: "K0UNINMASCOT" - Level Ball, Moon Ball, Fast Ball
30,000: "1YAHAYA" - Heavy Ball, Lure Ball, Beast Ball
100,000: "0KUGAFUKA1B0RU" - Love Ball, Friend Ball, Dream Ball
As of LGPE, wonder cards are no longer stored in saves. As such, players will not be able to inject this event into their save using PKHeX.
Format Ver.2.0.0-8, Post Updated Date:20200320_2202