In most regex flavors, including carriage return (CR) as part of the "any character" wildcard can be achieved by using the dot . metacharacter. However, the dot . typically does not match newline characters by default, including carriage return \r and line feed \n. To include carriage return along with other characters, you would need to use a special syntax or modifier depending on the regex flavor you're using.

Here are a few common ways to include carriage return in the "any character" wildcard:

1. Using a character class: [.\r]
2. Using a specific flag or modifier in the regex engine to make the dot match all characters including newline characters.

For example, in Python's regex module (re), you would use the re.DOTALL flag or (?s) inline modifier to make the dot match all characters including newline:

import re

pattern = r'.'
# Or, pattern = r'(?s).'

# Example usage
text = "abc\r123\n456"
matches = re.findall(pattern, text, flags=re.DOTALL)
print(matches)  # This will match 'a', 'b', 'c', '\r', '1', '2', '3', '\n', '4', '5', '6'

Make sure to consult the documentation of your specific regex engine to determine the appropriate method for including carriage return in the "any character" wildcard. Different regex flavors may have different methods or syntax for achieving this.