Yu-Gi-Oh! is notorious for being overly censored in the English releases of the cards. This has led to tons of card illustrations being altered to remove anything which can be remotely considered a religious symbol, violent, a weapon, or sexual content. If any crap makes it past the radar, it gets rereleased with a new, altered drawing. Examples include:
The Stripperiffic Harpy Lady, whose original outfit only had two strips of cloth covering her breasts. The censored version has a shirt underneath.
Harpie girl. The censorship was missed in the first run and was fixed later, but it was too late. It's harder to find the censored version.
Aqua Chorus. You have to look close, but the dress is see-through, and there are nipples in the image.
While most of the cards with, well, suggestive materials, usually just women with low-cut shirts/dresses or high-cut skirts will be edited for international release, they somehow didn't edit this.
The flavor text for the censored Nekogal #1 refers to her as a "Pussy Fairy."... Yeah.
Malevolent Nuzzler is an extremely suggestive card. The art depicts a demonic woman with a seductive expression that is heavily implied to be nude from the chest down with the border cutting through right where her cleavage would start. As if the art itself wasn't questionable enough on its own look at its name, fairly suggestive right? So what does the card do? It gives a monster +700 attack and the player can pay 500LP to get it back when it's sent to the graveyard. Seems innocent in effect at least... except that this isn't a temporary spell, but an equip card. Yep. So a nude demonic woman equips to a monster, "nuzzles" it and raises its attack power... and it can come back again and againif you give life energy to it. What's worse is that the Japanese version is named "Akuma no Kuchizuke" (Demon's Kiss) which eliminates any doubt as to the true nature of what this entity is.