Now that I know the Toothless one was ripped I'm really questioning the authenticity of all the others. I know that you're no longer claiming that the images are your artwork, but I'll reinforce what @Ultrapirateboy said. By not providing proper credits to the artist in your post you are plagiarizing another person's work.
Also, I understand that you're building off other people's work to get your feet wet in illustrator. That is perfectly fine and normal, but please give credit where it is due.
Also, I understand that you're building off other people's work to get your feet wet in illustrator. That is perfectly fine and normal, but please give credit where it is due.