Resources used: (bare in mind that I do quite a lot of editing on pictures so you might not get quite the same results)

Photoshop
Stable Diffusion (Forge)
Extension: Forge Couple
Model:  chromaxlMix_v4Sorbet.safetensors
Loras: <lora:Smooth Anime 2 Style SDXL_LoRA_Pony Diffusion V6 XL:0.7>, <lora:Pony_DetailV2.0:0.7>, 
Steps: 13, Sampler: Euler a, Schedule type: Beta, CFG scale: 1.5, Denoising strength: 0.1, Clip skip: 2, Mask blur: 4,

Sonic and Shadow

Positiv:
<lora:NyotaimoriV10IllustriousXL:1>, <lora:Smooth Anime 2 Style SDXL_LoRA_Pony Diffusion V6 XL:0.7>, <lora:Pony_DetailV2.0:0.7>, smooth anime style, masterpiece, best quality, sonic the hedgehog \(series\), 2boys, duo, living room,
Sonic the Hedgehog laying on back, erect penis, balls, tall, blush, posing on bed, adult, athletic, white gloves, athletic, twink, Shadow the Hedgehog holding chopsticks, looking at one another, nyotaimori, on table, sushi, sushi on body, maki, smirk,

Negative prompt: 
busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, tears, piercing, lips, shoes , socks, eyelashes, plate, plates,

Tails

Positiv: 
<lora:NyotaimoriV10IllustriousXL:0.8>, <lora:Smooth Anime 2 Style SDXL_LoRA_Pony Diffusion V6 XL:0.7>, <lora:Pony_DetailV2.0:0.7>, smooth anime style, masterpiece, best quality, sonic the hedgehog \(series\),living room, solo,
Tails the fox laying on back, balls, tall, wide hips, round rump, blush, nervous, adult, athletic, white gloves, twink, nyotaimori, male, on table, laying on table, wide angle view, full body view, erect penis, smile,

Negative prompt: 
busty, ugly face, mutated hands, low res, blurry face, black and white, text, human, watermark, chubby, pubic hair, eyelashes, tears, piercing, lips, shoes , socks, eyelashes, plate, plates, ((((Female)))), ((breasts)),