No
There are 4 draw 4 cards in Uno. Oh the Irony
These cards are from Uno.
Uno starts with a draw
They must draw 2 cards and miss a turn, however if they have another draw 2, they can put this ontop and make the next person draw 4!
You can finish Uno with those
Four
Yes, the last card played in a round could be any playable card. If the last card played is a Draw 2 or a Wild Draw 4, the next player still must draw the appropriate number of cards before adding up his/her points.
yes a wild card can stop a draw and or a draw four card
No, if a draw 4 is placed, the player MUST draw 4, there is no way out of it. However if the player who placed the draw 4 has a card that is the current colour, you can challenge them, they then have to show there cards, if they do then they must draw 2, but if you are wrong you must draw 2 extra cards.
There is a commonly used 'house rule', also called Progressive UNO, that allows a player to counter a Draw Two card used against them by playing a Draw Two of their own on top of it. Then the next player has to draw 4 cards, unless they also have a Draw Two, etc. This can also be done with Wild Draw Four cards, but not a mixture of the two.
Mercatone Uno ended in 2003.