G'day mrguy123,
The following substitution should do what you want:
s/(\d+)$/my $y = $1; ++$y/e
In use with your specific example:
$ perl -Mstrict -Mwarnings -E '
my $x = q{EVO:0000023};
$x =~ s/(\d+)$/my $y = $1; ++$y/e;
say $x
'
EVO:0000024
And, assuming you want 0000099 to roll over to 0000100, this works unchanged:
$ perl -Mstrict -Mwarnings -E '
my $x = q{EVO:0000099};
$x =~ s/(\d+)$/my $y = $1; ++$y/e;
say $x
'
EVO:0000100
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