Hey there! I haven't done this before, but I'm giving away shinies for free! The demand rate if any might be so low, so I will be going with the 1 Pokémon-per-person policy and it's first come, first serve. Below is the list of Pokémon that will be given away:
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Parasect (Para)
Nature: Jolly
Characteristic: Takes plenty of siestas
Game: BD (originated from PLA)
Reserved by: N/A

Lickitung
Nature: Impish
Characteristic: Impetuous and silly
Game: BD (originated from PLA)
Reserved by: N/A

Rhyhorn
Nature: Sassy
Characteristic: Hates to lose
Game: BD (originated from PLA)
Reserved by: N/A

Bidoof
Nature: Hardy
Characteristic: Good perseverance
Game: BD (originated from PLA)
Reserved by: N/A

Bibarel
Nature: Jolly
Characteristic: Likes to thrash about
Game: BD (originated from PLA)
Reserved by: N/A

Mime Jr.
Nature: Timid
Characteristic: Quick to flee
Game: BD (originated from PLA)
Reserved by: N/A

Charmander
Nature: Timid
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Cyndaquil
Nature: Timid
Characteristic: Takes plenty of siestas
Game: Scarlet
Reserved by: N/A

Oshawott
Nature: Adamant
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Chespin
Nature: Impish
Characteristic: Takes plenty od siestas
Game: Scarlet
Reserved by: N/A

Fennekin
Nature: Lonely
Characteristic: Mischievous
Game: Scarlet
Reserved by: N/A

Froakie
Nature: Timid
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Rowlet
Nature: Adamant
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Grookey
Nature: Quirky
Characteristic: Mischievous
Game: Scarlet
Reserved by: N/A

Scorbunny
Nature: Timid
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Sobble
Nature: Modest
Characteristic: Takes plenty of siestas
Game: Scarlet
Reserved by: N/A

Sprigatito
Nature: Jolly
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Fuecoco
Nature: Modest
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Quaxly
Nature: Adamant
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Pichu
Nature: Timid
Characteristic: Likes to thrash about
Game: Scarlet
Reserved by: N/A

Eevee
Nature: Docile
Characteristic: Somewhat vain
Game: Scarlet
Reserved by: N/A
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The code for the giveaway is 3900-4225. The amount of Pokémon left to give away is 6 in Brilliant Diamond, 15 in Scarlet, and 21 in total.