Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
Rules
Growth will give (+2 instead of +1) for both Atk and SpA, Synthesis will heal 2/3rd total health, Solar Beam will need no charge turn and Weather Ball will permanently have Fire coverage
Patting the chikorita plushy on my work desk and cackling
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A similar logic governs how Gengar is discussed under the physical/special split in Generation III. Because Ghost-type moves are physical and Gengarβs strengths lie in Special Attack, it is often framed as mismatched, another case of design working against itself! But this judgment begins from the assumption that the system exists to maximize offensive output. In that frame, anything that does not convert cleanly into damage appears deficient.
Me throwing it on a rain team 
, I started writing this as a joke but it would actually be a really good switch in for grass and electric type attacks
An opposing Mega Meganium would utterly wall and murder your rain team with single charge solar beam
Does Meganium learn Growth? Years since I have touched pokemon games
+2 stages atk and spatk is a LOT for one move
So next they're going to finally buff Magikarp, right?
Bit idea: Magikarp unionizing and coming together to deal impressive damage that none of them alone could do
151 was enough
Mega Meganium still seems pretty mid. Grass/Fairy is an awkward type combo and while 1-turn Solar Beam off of 143 SAtk is good, it's nothing special for Megas. The real shit would've been Triage as its ability.
Grass/Fairy is a decent type, Tapu Bulu showed this. It is indeed awkward, but as Tyranitar shows, it's about having enough resistances to enter the field. Grass/Fairy has all the relevant resistances to Water, Fighting, Dark, Ground, Electric. Also Mega Stone cannot be Knock Off'd. Then it can boost to +2 on switch in and fire away hard hitting attacks. Fairy/Fire/Grass is a really good coverage, Mega Meganium can even drop the Grass attack for Synthesis to heal 2/3rd HP or Knock Off for mixed attack and utility because Growth boost both Atk and SpA. Fairy/Fire/Dark hits the whole roster for at least neutral damage. Any Fire pokemon coming in will hate getting Knock'd Off because they are weak to Stealth Rocks.
I'd say it'll be at least UU viable.
Tapu Bulu created Grassy Terrain on switch-in, could hold an item and didn't require your Mega slot.
Fairy/Fire/Grass is a really good coverage, Mega Meganium can even drop the Grass attack for Synthesis to heal 2/3rd HP or Knock Off for mixed attack and utility because Growth boost both Atk and SpA.
Even at +2 Atk, your Knock Off won't do very much damage to neutral targets. Your Fairy STAB is Dazzling Gleam which isn't very powerful either. Meganium will be very reliant on the high base power on Weather Ball and Solar Beam. It has good resistances but also a multitude of common weaknesses and while it's not slow, it's not fast either. It will be able to get a boost off fairly consistently due to its bulk, but I just don't see it sweeping teams.
I think UU viability in Gen 9 is optimistic. Imo it's gonna be ranked RU. The power level has increased a lot.
I wish they just buffed starter pokemon abilities. Starter pokemon almost always go for their non-default abilities
Pokemon really said "ok faggots you can win a tournament with a team of sissies now you earned it" with Mega Meganium πππ