Missing images for alternate versions of certain Pokemon

[devtanc]

• Pichu
• Unown
• Castform
• Deoxys
• Burmy
• Wormadam
• Cherrim
• Shellos
• Gastrodon
• Rotom
• Giratina
• Shaymin
• Arceus
• Basculin
• Darmanitan
• Deerling
• Sawsbuck
• Tornadus
• Thundurus
• Landorus
• Kyurem
• Keldeo
• Meloetta
• Genesect
• Vivillon
• Flabébé
• Floette
• Florges
• Furfrou
• Aegislash
• Pumpkaboo
• Gourgeist
• Xerneas
• Zygarde
• Hoopa
• Pikachu (Cosplay versions??)

Naming conventions:
351Castform-Sunny.png or 412Burmy-Sandy.png for full-size or thumbnails
351MS-Sunny.png or 412MS-Sandy.png for sprites, when available
Then in the pokedex file, each pokemon would have a property called forms like so (example is for pikachu):

forms: [
  {
    ename: 'Cosplay',
    cname: '',
    //etc...
  },
  {
    ename: 'Rock Star',
    cname: '',
    flatName: 'RockStar',
    //etc...
  }, //etc...
]

All forms I could find are below:
Pikachu Cosplay Pikachu
Pikachu Pikachu Rock Star
Pikachu Pikachu Belle
Pikachu Pikachu Pop Star
Pikachu Pikachu, Ph. D
Pikachu Pikachu Libre
Pichu Spiky-eared Pichu
Unown One form
Castform Normal
Castform Sunny Form
Castform Rainy Form
Castform Snowy Form
Deoxys Normal Forme
Deoxys Attack Forme
Deoxys Defense Forme
Deoxys Speed Forme
Burmy Plant Cloak
Burmy Sandy Cloak
Burmy Trash Cloak
Wormadam Plant Cloak
Wormadam Sandy Cloak
Wormadam Trash Cloak
Cherrim Overcast Form
Cherrim Sunshine Form
Shellos West Sea
Shellos East Sea
Gastrodon West Sea
Gastrodon East Sea
Rotom Rotom
Rotom Heat Rotom
Rotom Wash Rotom
Rotom Frost Rotom
Rotom Fan Rotom
Rotom Mow Rotom
Giratina Altered Forme
Giratina Origin Forme
Shaymin Land Forme
Shaymin Sky Forme
Arceus Arceus
Basculin Red-Striped Form
Basculin Blue-Striped Form
Darmanitan Standard Mode
Darmanitan Zen Mode
Deerling Spring Form
Deerling Summer Form
Deerling Autumn Form
Deerling Winter Form
Sawsbuck Spring Form
Sawsbuck Summer Form
Sawsbuck Autumn Form
Sawsbuck Winter Form
Tornadus Incarnate Forme
Tornadus Therian Forme
Thundurus Incarnate Forme
Thundurus Therian Forme
Landorus Incarnate Forme
Landorus Therian Forme
Kyurem Kyurem
Kyurem White Kyurem
Kyurem Black Kyurem
Keldeo Ordinary Form
Keldeo Resolute Form
Meloetta Aria Forme
Meloetta Pirouette Forme
Genesect Genesect
Vivillon Icy Snow Pattern
Vivillon Polar Pattern
Vivillon Tundra Pattern
Vivillon Continental Pattern
Vivillon Garden Pattern
Vivillon Elegant Pattern
Vivillon Meadow Pattern
Vivillon Modern Pattern
Vivillon Marine Pattern
Vivillon Archipelago Pattern
Vivillon High Plains Pattern
Vivillon Sandstorm Pattern
Vivillon River Pattern
Vivillon Monsoon Pattern
Vivillon Savanna Pattern
Vivillon Sun Pattern
Vivillon Ocean Pattern
Vivillon Jungle Pattern
Vivillon Fancy Pattern
Vivillon Poké Ball Pattern
Flabébé Red Flower
Flabébé Yellow Flower
Flabébé Orange Flower
Flabébé Blue Flower
Flabébé White Flower
Floette Red Flower
Floette Yellow Flower
Floette Orange Flower
Floette Blue Flower
Floette White Flower
Floette Eternal Flower
Florges Red Flower
Florges Yellow Flower
Florges Orange Flower
Florges Blue Flower
Florges White Flower
Furfrou Natural Form
Furfrou Heart Trim
Furfrou Star Trim
Furfrou Diamond Trim
Furfrou Debutante Trim
Furfrou Matron Trim
Furfrou Dandy Trim
Furfrou La Reine Trim
Furfrou Kabuki Trim
Furfrou Pharaoh Trim
Aegislash Shield Forme
Aegislash Blade Forme
Pumpkaboo Average Size
Pumpkaboo Small Size
Pumpkaboo Large Size
Pumpkaboo Super Size
Gourgeist Average Size
Gourgeist Small Size
Gourgeist Large Size
Gourgeist Super Size
Xerneas Neutral Mode
Xerneas Active Mode
Zygarde Zygarde Cell
Zygarde Zygarde Core
Zygarde Zygarde 10% Forme
Zygarde Zygarde 50% Forme
Zygarde Zygarde Complete Forme
Hoopa Hoopa Confined
Hoopa Hoopa Unbound

[Purukitto]

Looking forward to this commit